WebProcessCocoa.mm [plain text]
/*
* Copyright (C) 2010-2018 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#import "config.h"
#import "WebProcess.h"
#import "WebProcessCocoa.h"
#import "LegacyCustomProtocolManager.h"
#import "LogInitialization.h"
#import "Logging.h"
#import "ObjCObjectGraph.h"
#import "SandboxExtension.h"
#import "SandboxInitializationParameters.h"
#import "SessionTracker.h"
#import "WKAPICast.h"
#import "WKBrowsingContextHandleInternal.h"
#import "WKCrashReporter.h"
#import "WKFullKeyboardAccessWatcher.h"
#import "WKTypeRefWrapper.h"
#import "WKWebProcessPlugInBrowserContextControllerInternal.h"
#import "WebFrame.h"
#import "WebInspector.h"
#import "WebPage.h"
#import "WebProcessCreationParameters.h"
#import "WebProcessProxyMessages.h"
#import "WebsiteDataStoreParameters.h"
#import <JavaScriptCore/ConfigFile.h>
#import <JavaScriptCore/Options.h>
#import <WebCore/AVFoundationMIMETypeCache.h>
#import <WebCore/AXObjectCache.h>
#import <WebCore/CPUMonitor.h>
#import <WebCore/FileSystem.h>
#import <WebCore/FontCache.h>
#import <WebCore/FontCascade.h>
#import <WebCore/LocalizedStrings.h>
#import <WebCore/LogInitialization.h>
#import <WebCore/MemoryRelease.h>
#import <WebCore/NSScrollerImpDetails.h>
#import <WebCore/PerformanceLogging.h>
#import <WebCore/RuntimeApplicationChecks.h>
#import <WebCore/WebCoreNSURLExtras.h>
#import <algorithm>
#import <dispatch/dispatch.h>
#import <objc/runtime.h>
#import <pal/spi/cocoa/LaunchServicesSPI.h>
#import <pal/spi/cocoa/QuartzCoreSPI.h>
#import <pal/spi/cocoa/pthreadSPI.h>
#import <pal/spi/mac/NSAccessibilitySPI.h>
#import <pal/spi/mac/NSApplicationSPI.h>
#import <stdio.h>
#if PLATFORM(IOS)
#import <UIKit/UIAccessibility.h>
#import <pal/spi/ios/GraphicsServicesSPI.h>
#if USE(APPLE_INTERNAL_SDK)
#import <AXRuntime/AXDefines.h>
#import <AXRuntime/AXNotificationConstants.h>
#else
#define kAXPidStatusChangedNotification 0
#endif
#endif
#if PLATFORM(MAC)
#import <WebCore/ScrollbarThemeMac.h>
#import <pal/spi/mac/NSScrollerImpSPI.h>
#endif
#if USE(OS_STATE)
#import <os/state_private.h>
#endif
using namespace WebCore;
namespace WebKit {
#if PLATFORM(MAC)
static const Seconds cpuMonitoringInterval { 8_min };
#endif
void WebProcess::platformSetCacheModel(CacheModel)
{
}
#if USE(APPKIT)
static id NSApplicationAccessibilityFocusedUIElement(NSApplication*, SEL)
{
WebPage* page = WebProcess::singleton().focusedWebPage();
if (!page || !page->accessibilityRemoteObject())
return 0;
return [page->accessibilityRemoteObject() accessibilityFocusedUIElement];
}
#endif
void WebProcess::platformInitializeWebProcess(WebProcessCreationParameters&& parameters)
{
#if !LOG_DISABLED || !RELEASE_LOG_DISABLED
WebCore::initializeLogChannelsIfNecessary(parameters.webCoreLoggingChannels);
WebKit::initializeLogChannelsIfNecessary(parameters.webKitLoggingChannels);
#endif
WebCore::setApplicationBundleIdentifier(parameters.uiProcessBundleIdentifier);
WebCore::setApplicationSDKVersion(parameters.uiProcessSDKVersion);
SessionTracker::setIdentifierBase(parameters.uiProcessBundleIdentifier);
#if ENABLE(SANDBOX_EXTENSIONS)
SandboxExtension::consumePermanently(parameters.uiProcessBundleResourcePathExtensionHandle);
SandboxExtension::consumePermanently(parameters.webSQLDatabaseDirectoryExtensionHandle);
SandboxExtension::consumePermanently(parameters.applicationCacheDirectoryExtensionHandle);
SandboxExtension::consumePermanently(parameters.mediaCacheDirectoryExtensionHandle);
SandboxExtension::consumePermanently(parameters.mediaKeyStorageDirectoryExtensionHandle);
SandboxExtension::consumePermanently(parameters.javaScriptConfigurationDirectoryExtensionHandle);
#if ENABLE(MEDIA_STREAM)
SandboxExtension::consumePermanently(parameters.audioCaptureExtensionHandle);
#endif
#if PLATFORM(IOS)
SandboxExtension::consumePermanently(parameters.cookieStorageDirectoryExtensionHandle);
SandboxExtension::consumePermanently(parameters.containerCachesDirectoryExtensionHandle);
SandboxExtension::consumePermanently(parameters.containerTemporaryDirectoryExtensionHandle);
#endif
#endif
if (!parameters.javaScriptConfigurationDirectory.isEmpty()) {
String javaScriptConfigFile = parameters.javaScriptConfigurationDirectory + "/JSC.config";
JSC::processConfigFile(javaScriptConfigFile.latin1().data(), "com.apple.WebKit.WebContent", parameters.uiProcessBundleIdentifier.latin1().data());
}
// Disable NSURLCache.
auto urlCache = adoptNS([[NSURLCache alloc] initWithMemoryCapacity:0 diskCapacity:0 diskPath:nil]);
[NSURLCache setSharedURLCache:urlCache.get()];
#if PLATFORM(MAC)
WebCore::FontCache::setFontWhitelist(parameters.fontWhitelist);
#endif
m_compositingRenderServerPort = WTFMove(parameters.acceleratedCompositingPort);
WebCore::registerMemoryReleaseNotifyCallbacks();
MemoryPressureHandler::ReliefLogger::setLoggingEnabled(parameters.shouldEnableMemoryPressureReliefLogging);
setEnhancedAccessibility(parameters.accessibilityEnhancedUserInterfaceEnabled);
#if USE(APPKIT)
[[NSUserDefaults standardUserDefaults] registerDefaults:@{ @"NSApplicationCrashOnExceptions" : @YES }];
// rdar://9118639 accessibilityFocusedUIElement in NSApplication defaults to use the keyWindow. Since there's
// no window in WK2, NSApplication needs to use the focused page's focused element.
Method methodToPatch = class_getInstanceMethod([NSApplication class], @selector(accessibilityFocusedUIElement));
method_setImplementation(methodToPatch, (IMP)NSApplicationAccessibilityFocusedUIElement);
#endif
#if PLATFORM(MAC) && ENABLE(WEBPROCESS_NSRUNLOOP)
// Need to initialize accessibility for VoiceOver to work when the WebContent process is using NSRunLoop.
// Currently, it is also needed to allocate and initialize an NSApplication object.
// FIXME: Remove the following line when rdar://problem/36323569 is fixed.
[NSApplication sharedApplication];
[NSApplication _accessibilityInitialize];
#endif
#if TARGET_OS_IPHONE
// Priority decay on iOS 9 is impacting page load time so we fix the priority of the WebProcess' main thread (rdar://problem/22003112).
pthread_set_fixedpriority_self();
#endif
if (!parameters.mediaMIMETypes.isEmpty())
setMediaMIMETypes(parameters.mediaMIMETypes);
else {
AVFoundationMIMETypeCache::singleton().setCacheMIMETypesCallback([this](const Vector<String>& types) {
parentProcessConnection()->send(Messages::WebProcessProxy::CacheMediaMIMETypes(types), 0);
});
}
#if PLATFORM(MAC)
WebCore::setScreenProperties(parameters.screenProperties);
#if ENABLE(WEBPROCESS_WINDOWSERVER_BLOCKING)
scrollerStylePreferenceChanged(parameters.useOverlayScrollbars);
#endif
#endif
}
void WebProcess::initializeProcessName(const ChildProcessInitializationParameters& parameters)
{
#if !PLATFORM(IOS)
NSString *applicationName;
if (parameters.extraInitializationData.get("inspector-process"_s) == "1")
applicationName = [NSString stringWithFormat:WEB_UI_STRING("%@ Web Inspector", "Visible name of Web Inspector's web process. The argument is the application name."), (NSString *)parameters.uiProcessName];
#if ENABLE(SERVICE_WORKER)
else if (parameters.extraInitializationData.get("service-worker-process"_s) == "1")
applicationName = [NSString stringWithFormat:WEB_UI_STRING("%@ Service Worker (%@)", "Visible name of Service Worker process. The argument is the application name."), (NSString *)parameters.uiProcessName, (NSString *)parameters.extraInitializationData.get("security-origin"_s)];
#endif
else
applicationName = [NSString stringWithFormat:WEB_UI_STRING("%@ Web Content", "Visible name of the web process. The argument is the application name."), (NSString *)parameters.uiProcessName];
_LSSetApplicationInformationItem(kLSDefaultSessionID, _LSGetCurrentApplicationASN(), _kLSDisplayNameKey, (CFStringRef)applicationName, nullptr);
#endif
}
static void registerWithAccessibility()
{
#if USE(APPKIT)
[NSAccessibilityRemoteUIElement setRemoteUIApp:YES];
#endif
#if PLATFORM(IOS)
NSString *accessibilityBundlePath = [(NSString *)GSSystemRootDirectory() stringByAppendingString:@"/System/Library/AccessibilityBundles/WebProcessLoader.axbundle"];
NSError *error = nil;
if (![[NSBundle bundleWithPath:accessibilityBundlePath] loadAndReturnError:&error])
LOG_ERROR("Failed to load accessibility bundle at %@: %@", accessibilityBundlePath, error);
#endif
}
#if USE(OS_STATE)
void WebProcess::registerWithStateDumper()
{
os_state_add_handler(dispatch_get_main_queue(), ^(os_state_hints_t hints) {
@autoreleasepool {
os_state_data_t os_state = nil;
// Only gather state on faults and sysdiagnose. It's overkill for
// general error messages.
if (hints->osh_api == OS_STATE_API_ERROR)
return os_state;
// Create a dictionary to contain the collected state. This
// dictionary will be serialized and passed back to os_state.
auto stateDict = adoptNS([[NSMutableDictionary alloc] init]);
{
auto memoryUsageStats = adoptNS([[NSMutableDictionary alloc] init]);
for (auto& it : PerformanceLogging::memoryUsageStatistics(ShouldIncludeExpensiveComputations::Yes)) {
auto keyString = adoptNS([[NSString alloc] initWithUTF8String:it.key]);
[memoryUsageStats setObject:@(it.value) forKey:keyString.get()];
}
[stateDict setObject:memoryUsageStats.get() forKey:@"Memory Usage Stats"];
}
{
auto jsObjectCounts = adoptNS([[NSMutableDictionary alloc] init]);
for (auto& it : PerformanceLogging::javaScriptObjectCounts()) {
auto keyString = adoptNS([[NSString alloc] initWithUTF8String:it.key]);
[jsObjectCounts setObject:@(it.value) forKey:keyString.get()];
}
[stateDict setObject:jsObjectCounts.get() forKey:@"JavaScript Object Counts"];
}
auto pageLoadTimes = adoptNS([[NSMutableArray alloc] init]);
for (auto& page : m_pageMap.values()) {
if (page->usesEphemeralSession())
continue;
NSDate* date = [NSDate dateWithTimeIntervalSince1970:page->loadCommitTime().secondsSinceEpoch().seconds()];
[pageLoadTimes addObject:date];
}
// Adding an empty array to the process state may provide an
// indication of the existance of private sessions, which we'd like
// to hide, so don't add empty arrays.
if ([pageLoadTimes count])
[stateDict setObject:pageLoadTimes.get() forKey:@"Page Load Times"];
// --- Possibly add other state here as other entries in the dictionary. ---
// Submitting an empty process state object may provide an
// indication of the existance of private sessions, which we'd like
// to hide, so don't return empty dictionaries.
if (![stateDict count])
return os_state;
// Serialize the accumulated process state so that we can put the
// result in an os_state_data_t structure.
NSError* error = nil;
NSData* data = [NSPropertyListSerialization dataWithPropertyList:stateDict.get() format:NSPropertyListBinaryFormat_v1_0 options:0 error:&error];
if (!data) {
ASSERT(data);
return os_state;
}
size_t neededSize = OS_STATE_DATA_SIZE_NEEDED(data.length);
os_state = (os_state_data_t)malloc(neededSize);
if (os_state) {
memset(os_state, 0, neededSize);
os_state->osd_type = OS_STATE_DATA_SERIALIZED_NSCF_OBJECT;
os_state->osd_data_size = data.length;
strlcpy(os_state->osd_title, "WebContent state", sizeof(os_state->osd_title));
memcpy(os_state->osd_data, data.bytes, data.length);
}
return os_state;
}
});
}
#endif
void WebProcess::platformInitializeProcess(const ChildProcessInitializationParameters&)
{
#if PLATFORM(MAC)
#if ENABLE(WEBPROCESS_WINDOWSERVER_BLOCKING)
// Deny the WebContent process access to the WindowServer.
// This call will not succeed if there are open WindowServer connections at this point.
CGSSetDenyWindowServerConnections(true);
// Make sure that we close any WindowServer connections after checking in with Launch Services.
CGSShutdownServerConnections();
#else
if (![NSApp isRunning]) {
// This call is needed when the WebProcess is not running the NSApplication event loop.
// Otherwise, calling enableSandboxStyleFileQuarantine() will fail.
launchServicesCheckIn();
}
#endif // ENABLE(WEBPROCESS_WINDOWSERVER_BLOCKING)
#endif // PLATFORM(MAC)
registerWithAccessibility();
#if USE(OS_STATE)
registerWithStateDumper();
#endif
}
#if USE(APPKIT)
void WebProcess::stopRunLoop()
{
#if PLATFORM(MAC) && ENABLE(WEBPROCESS_NSRUNLOOP)
ChildProcess::stopNSRunLoop();
#else
ChildProcess::stopNSAppRunLoop();
#endif
}
#endif
void WebProcess::platformTerminate()
{
AVFoundationMIMETypeCache::singleton().setCacheMIMETypesCallback(nullptr);
}
RetainPtr<CFDataRef> WebProcess::sourceApplicationAuditData() const
{
#if PLATFORM(IOS)
audit_token_t auditToken;
ASSERT(parentProcessConnection());
if (!parentProcessConnection() || !parentProcessConnection()->getAuditToken(auditToken))
return nullptr;
return adoptCF(CFDataCreate(nullptr, (const UInt8*)&auditToken, sizeof(auditToken)));
#else
return nullptr;
#endif
}
void WebProcess::initializeSandbox(const ChildProcessInitializationParameters& parameters, SandboxInitializationParameters& sandboxParameters)
{
#if ENABLE(WEB_PROCESS_SANDBOX)
#if ENABLE(MANUAL_SANDBOXING)
// Need to override the default, because service has a different bundle ID.
#if WK_API_ENABLED
NSBundle *webKit2Bundle = [NSBundle bundleForClass:NSClassFromString(@"WKWebView")];
#else
NSBundle *webKit2Bundle = [NSBundle bundleForClass:NSClassFromString(@"WKView")];
#endif
#if PLATFORM(IOS) && !PLATFORM(IOSMAC)
sandboxParameters.setOverrideSandboxProfilePath([webKit2Bundle pathForResource:@"com.apple.WebKit.WebContent" ofType:@"sb"]);
#else
sandboxParameters.setOverrideSandboxProfilePath([webKit2Bundle pathForResource:@"com.apple.WebProcess" ofType:@"sb"]);
#endif
ChildProcess::initializeSandbox(parameters, sandboxParameters);
#endif
#else
UNUSED_PARAM(parameters);
UNUSED_PARAM(sandboxParameters);
#endif
}
#if PLATFORM(MAC)
static NSURL *origin(WebPage& page)
{
WebFrame* mainFrame = page.mainWebFrame();
if (!mainFrame)
return nil;
URL mainFrameURL(URL(), mainFrame->url());
Ref<SecurityOrigin> mainFrameOrigin = SecurityOrigin::create(mainFrameURL);
String mainFrameOriginString;
if (!mainFrameOrigin->isUnique())
mainFrameOriginString = mainFrameOrigin->toRawString();
else
mainFrameOriginString = makeString(mainFrameURL.protocol(), ':'); // toRawString() is not supposed to work with unique origins, and would just return "://".
// +[NSURL URLWithString:] returns nil when its argument is malformed. It's unclear when we would have a malformed URL here,
// but it happens in practice according to <rdar://problem/14173389>. Leaving an assertion in to catch a reproducible case.
ASSERT([NSURL URLWithString:mainFrameOriginString]);
return [NSURL URLWithString:mainFrameOriginString];
}
#endif
void WebProcess::updateActivePages()
{
#if PLATFORM(MAC)
auto activePageURLs = adoptNS([[NSMutableArray alloc] init]);
for (auto& page : m_pageMap.values()) {
if (page->usesEphemeralSession() || page->isSuspended())
continue;
if (NSURL *originAsURL = origin(*page))
[activePageURLs addObject:userVisibleString(originAsURL)];
}
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), [activePageURLs] {
_LSSetApplicationInformationItem(kLSDefaultSessionID, _LSGetCurrentApplicationASN(), CFSTR("LSActivePageUserVisibleOriginsKey"), (__bridge CFArrayRef)activePageURLs.get(), nullptr);
});
#endif
}
void WebProcess::updateCPULimit()
{
#if PLATFORM(MAC)
std::optional<double> cpuLimit;
// Use the largest limit among all pages in this process.
for (auto& page : m_pageMap.values()) {
auto pageCPULimit = page->cpuLimit();
if (!pageCPULimit) {
cpuLimit = std::nullopt;
break;
}
if (!cpuLimit || pageCPULimit > cpuLimit.value())
cpuLimit = pageCPULimit;
}
if (m_cpuLimit == cpuLimit)
return;
m_cpuLimit = cpuLimit;
updateCPUMonitorState(CPUMonitorUpdateReason::LimitHasChanged);
#endif
}
void WebProcess::updateCPUMonitorState(CPUMonitorUpdateReason reason)
{
#if PLATFORM(MAC)
if (!m_cpuLimit) {
if (m_cpuMonitor)
m_cpuMonitor->setCPULimit(std::nullopt);
return;
}
if (!m_cpuMonitor) {
m_cpuMonitor = std::make_unique<CPUMonitor>(cpuMonitoringInterval, [this](double cpuUsage) {
RELEASE_LOG(PerformanceLogging, "%p - WebProcess exceeded CPU limit of %.1f%% (was using %.1f%%) hasVisiblePages? %d", this, m_cpuLimit.value() * 100, cpuUsage * 100, hasVisibleWebPage());
parentProcessConnection()->send(Messages::WebProcessProxy::DidExceedCPULimit(), 0);
});
} else if (reason == CPUMonitorUpdateReason::VisibilityHasChanged) {
// If the visibility has changed, stop the CPU monitor before setting its limit. This is needed because the CPU usage can vary wildly based on visibility and we would
// not want to report that a process has exceeded its background CPU limit even though most of the CPU time was used while the process was visible.
m_cpuMonitor->setCPULimit(std::nullopt);
}
m_cpuMonitor->setCPULimit(m_cpuLimit.value());
#else
UNUSED_PARAM(reason);
#endif
}
RefPtr<ObjCObjectGraph> WebProcess::transformHandlesToObjects(ObjCObjectGraph& objectGraph)
{
struct Transformer final : ObjCObjectGraph::Transformer {
Transformer(WebProcess& webProcess)
: m_webProcess(webProcess)
{
}
bool shouldTransformObject(id object) const override
{
#if WK_API_ENABLED
if (dynamic_objc_cast<WKBrowsingContextHandle>(object))
return true;
if (dynamic_objc_cast<WKTypeRefWrapper>(object))
return true;
#endif
return false;
}
RetainPtr<id> transformObject(id object) const override
{
#if WK_API_ENABLED
if (auto* handle = dynamic_objc_cast<WKBrowsingContextHandle>(object)) {
if (auto* webPage = m_webProcess.webPage(handle._pageID))
return wrapper(*webPage);
return [NSNull null];
}
if (auto* wrapper = dynamic_objc_cast<WKTypeRefWrapper>(object))
return adoptNS([[WKTypeRefWrapper alloc] initWithObject:toAPI(m_webProcess.transformHandlesToObjects(toImpl(wrapper.object)).get())]);
#endif
return object;
}
WebProcess& m_webProcess;
};
return ObjCObjectGraph::create(ObjCObjectGraph::transform(objectGraph.rootObject(), Transformer(*this)).get());
}
RefPtr<ObjCObjectGraph> WebProcess::transformObjectsToHandles(ObjCObjectGraph& objectGraph)
{
struct Transformer final : ObjCObjectGraph::Transformer {
bool shouldTransformObject(id object) const override
{
#if WK_API_ENABLED
if (dynamic_objc_cast<WKWebProcessPlugInBrowserContextController>(object))
return true;
if (dynamic_objc_cast<WKTypeRefWrapper>(object))
return true;
#endif
return false;
}
RetainPtr<id> transformObject(id object) const override
{
#if WK_API_ENABLED
if (auto* controller = dynamic_objc_cast<WKWebProcessPlugInBrowserContextController>(object))
return controller.handle;
if (auto* wrapper = dynamic_objc_cast<WKTypeRefWrapper>(object))
return adoptNS([[WKTypeRefWrapper alloc] initWithObject:toAPI(transformObjectsToHandles(toImpl(wrapper.object)).get())]);
#endif
return object;
}
};
return ObjCObjectGraph::create(ObjCObjectGraph::transform(objectGraph.rootObject(), Transformer()).get());
}
void WebProcess::destroyRenderingResources()
{
#if !RELEASE_LOG_DISABLED
MonotonicTime startTime = MonotonicTime::now();
#endif
CABackingStoreCollectBlocking();
#if !RELEASE_LOG_DISABLED
MonotonicTime endTime = MonotonicTime::now();
#endif
RELEASE_LOG(ProcessSuspension, "%p - WebProcess::destroyRenderingResources() took %.2fms", this, (endTime - startTime).milliseconds());
}
// FIXME: This should live somewhere else, and it should have the implementation in line instead of calling out to WKSI.
void _WKSetCrashReportApplicationSpecificInformation(NSString *infoString)
{
return setCrashReportApplicationSpecificInformation((__bridge CFStringRef)infoString);
}
#if PLATFORM(IOS)
void WebProcess::accessibilityProcessSuspendedNotification(bool suspended)
{
UIAccessibilityPostNotification(kAXPidStatusChangedNotification, @{ @"pid" : @(getpid()), @"suspended" : @(suspended) });
}
#endif
#if PLATFORM(MAC) && ENABLE(WEBPROCESS_WINDOWSERVER_BLOCKING)
void WebProcess::scrollerStylePreferenceChanged(bool useOverlayScrollbars)
{
ScrollerStyle::setUseOverlayScrollbars(useOverlayScrollbars);
ScrollbarTheme& theme = ScrollbarTheme::theme();
if (theme.isMockTheme())
return;
static_cast<ScrollbarThemeMac&>(theme).preferencesChanged();
NSScrollerStyle style = useOverlayScrollbars ? NSScrollerStyleOverlay : NSScrollerStyleLegacy;
[NSScrollerImpPair _updateAllScrollerImpPairsForNewRecommendedScrollerStyle:style];
}
#endif
void WebProcess::setMediaMIMETypes(const Vector<String> types)
{
AVFoundationMIMETypeCache::singleton().setSupportedTypes(types);
}
} // namespace WebKit