| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "third_party/blink/renderer/core/workers/dedicated_worker.h" |
| |
| #include <utility> |
| #include "base/feature_list.h" |
| #include "mojo/public/cpp/bindings/pending_remote.h" |
| #include "services/network/public/mojom/fetch_api.mojom-blink.h" |
| #include "services/service_manager/public/cpp/interface_provider.h" |
| #include "services/service_manager/public/mojom/interface_provider.mojom-blink.h" |
| #include "third_party/blink/public/common/blob/blob_utils.h" |
| #include "third_party/blink/public/common/features.h" |
| #include "third_party/blink/public/mojom/script/script_type.mojom-blink.h" |
| #include "third_party/blink/public/mojom/worker/dedicated_worker_host_factory.mojom-blink.h" |
| #include "third_party/blink/public/platform/web_content_settings_client.h" |
| #include "third_party/blink/renderer/bindings/core/v8/serialization/post_message_helper.h" |
| #include "third_party/blink/renderer/core/core_initializer.h" |
| #include "third_party/blink/renderer/core/dom/document.h" |
| #include "third_party/blink/renderer/core/events/message_event.h" |
| #include "third_party/blink/renderer/core/execution_context/execution_context.h" |
| #include "third_party/blink/renderer/core/fetch/request.h" |
| #include "third_party/blink/renderer/core/fileapi/public_url_manager.h" |
| #include "third_party/blink/renderer/core/frame/local_frame.h" |
| #include "third_party/blink/renderer/core/frame/local_frame_client.h" |
| #include "third_party/blink/renderer/core/frame/web_frame_widget_base.h" |
| #include "third_party/blink/renderer/core/frame/web_local_frame_impl.h" |
| #include "third_party/blink/renderer/core/inspector/main_thread_debugger.h" |
| #include "third_party/blink/renderer/core/loader/appcache/application_cache_host.h" |
| #include "third_party/blink/renderer/core/loader/document_loader.h" |
| #include "third_party/blink/renderer/core/loader/frame_loader.h" |
| #include "third_party/blink/renderer/core/loader/worker_fetch_context.h" |
| #include "third_party/blink/renderer/core/messaging/post_message_options.h" |
| #include "third_party/blink/renderer/core/origin_trials/origin_trial_context.h" |
| #include "third_party/blink/renderer/core/page/page.h" |
| #include "third_party/blink/renderer/core/probe/core_probes.h" |
| #include "third_party/blink/renderer/core/script/script.h" |
| #include "third_party/blink/renderer/core/workers/dedicated_worker_messaging_proxy.h" |
| #include "third_party/blink/renderer/core/workers/worker_classic_script_loader.h" |
| #include "third_party/blink/renderer/core/workers/worker_clients.h" |
| #include "third_party/blink/renderer/core/workers/worker_global_scope.h" |
| #include "third_party/blink/renderer/platform/bindings/exception_state.h" |
| #include "third_party/blink/renderer/platform/bindings/script_state.h" |
| #include "third_party/blink/renderer/platform/instrumentation/histogram.h" |
| #include "third_party/blink/renderer/platform/instrumentation/use_counter.h" |
| #include "third_party/blink/renderer/platform/loader/fetch/resource_fetcher.h" |
| #include "third_party/blink/renderer/platform/loader/fetch/resource_fetcher_properties.h" |
| #include "third_party/blink/renderer/platform/weborigin/security_policy.h" |
| |
| namespace blink { |
| |
| namespace { |
| |
| // Indicates whether the origin of worker top-level script's request URL is |
| // same-origin as the parent execution context's origin or not. |
| // This is used for UMA and thus the existing values should not be changed. |
| enum class WorkerTopLevelScriptOriginType { |
| kSameOrigin = 0, |
| kDataUrl = 1, |
| |
| // Cross-origin worker request URL (e.g. https://example.com/worker.js) |
| // from an chrome-extension: page. |
| kCrossOriginFromExtension = 2, |
| |
| // Cross-origin worker request URL from a non chrome-extension: page. |
| // There are no known cases for this, and we investigate whether there are |
| // really no occurrences. |
| kCrossOriginOthers = 3, |
| |
| kMaxValue = kCrossOriginOthers |
| }; |
| |
| void CountTopLevelScriptRequestUrlOriginType( |
| const SecurityOrigin& context_origin, |
| const KURL& request_url) { |
| WorkerTopLevelScriptOriginType origin_type; |
| if (request_url.ProtocolIsData()) { |
| origin_type = WorkerTopLevelScriptOriginType::kDataUrl; |
| } else if (context_origin.IsSameSchemeHostPort( |
| SecurityOrigin::Create(request_url).get())) { |
| origin_type = WorkerTopLevelScriptOriginType::kSameOrigin; |
| } else if (context_origin.Protocol() == "chrome-extension") { |
| // Note: using "chrome-extension" scheme check here is a layering |
| // violation. Do not use this except for UMA purpose. |
| origin_type = WorkerTopLevelScriptOriginType::kCrossOriginFromExtension; |
| } else { |
| origin_type = WorkerTopLevelScriptOriginType::kCrossOriginOthers; |
| } |
| UMA_HISTOGRAM_ENUMERATION( |
| "Worker.TopLevelScript.OriginType.RequestUrl.DedicatedWorker", |
| origin_type); |
| } |
| |
| } // namespace |
| |
| DedicatedWorker* DedicatedWorker::Create(ExecutionContext* context, |
| const String& url, |
| const WorkerOptions* options, |
| ExceptionState& exception_state) { |
| DCHECK(context->IsContextThread()); |
| UseCounter::Count(context, WebFeature::kWorkerStart); |
| if (context->IsContextDestroyed()) { |
| exception_state.ThrowDOMException(DOMExceptionCode::kInvalidAccessError, |
| "The context provided is invalid."); |
| return nullptr; |
| } |
| |
| KURL script_request_url = ResolveURL(context, url, exception_state, |
| mojom::RequestContextType::SCRIPT); |
| if (!script_request_url.IsValid()) { |
| // Don't throw an exception here because it's already thrown in |
| // ResolveURL(). |
| return nullptr; |
| } |
| |
| // TODO(nhiroki): Remove this flag check once module loading for |
| // DedicatedWorker is enabled by default (https://crbug.com/680046). |
| if (options->type() == "module" && |
| !RuntimeEnabledFeatures::ModuleDedicatedWorkerEnabled()) { |
| exception_state.ThrowTypeError( |
| "Module scripts are not supported on DedicatedWorker yet. You can try " |
| "the feature with '--enable-experimental-web-platform-features' flag " |
| "(see https://crbug.com/680046)"); |
| return nullptr; |
| } |
| |
| if (context->IsWorkerGlobalScope()) |
| UseCounter::Count(context, WebFeature::kNestedDedicatedWorker); |
| |
| DedicatedWorker* worker = MakeGarbageCollected<DedicatedWorker>( |
| context, script_request_url, options); |
| worker->UpdateStateIfNeeded(); |
| worker->Start(); |
| return worker; |
| } |
| |
| DedicatedWorker::DedicatedWorker(ExecutionContext* context, |
| const KURL& script_request_url, |
| const WorkerOptions* options) |
| : AbstractWorker(context), |
| script_request_url_(script_request_url), |
| options_(options), |
| context_proxy_( |
| MakeGarbageCollected<DedicatedWorkerMessagingProxy>(context, this)), |
| factory_client_( |
| Platform::Current()->CreateDedicatedWorkerHostFactoryClient( |
| this, |
| GetExecutionContext()->GetInterfaceProvider())) { |
| DCHECK(context->IsContextThread()); |
| DCHECK(script_request_url_.IsValid()); |
| DCHECK(context_proxy_); |
| |
| // For nested workers, ensure the inside ResourceFetcher because it may not |
| // have been used yet. |
| // For documents, the ResourceFetcher is always already valid. |
| if (auto* scope = DynamicTo<WorkerGlobalScope>(*context)) |
| scope->EnsureFetcher(); |
| |
| outside_fetch_client_settings_object_ = |
| MakeGarbageCollected<FetchClientSettingsObjectSnapshot>( |
| context->Fetcher()->GetProperties().GetFetchClientSettingsObject()); |
| } |
| |
| DedicatedWorker::~DedicatedWorker() = default; |
| |
| void DedicatedWorker::Dispose() { |
| DCHECK(!GetExecutionContext() || GetExecutionContext()->IsContextThread()); |
| context_proxy_->ParentObjectDestroyed(); |
| factory_client_.reset(); |
| } |
| |
| void DedicatedWorker::postMessage(ScriptState* script_state, |
| const ScriptValue& message, |
| Vector<ScriptValue>& transfer, |
| ExceptionState& exception_state) { |
| PostMessageOptions* options = PostMessageOptions::Create(); |
| if (!transfer.IsEmpty()) |
| options->setTransfer(transfer); |
| postMessage(script_state, message, options, exception_state); |
| } |
| |
| void DedicatedWorker::postMessage(ScriptState* script_state, |
| const ScriptValue& message, |
| const PostMessageOptions* options, |
| ExceptionState& exception_state) { |
| DCHECK(GetExecutionContext()->IsContextThread()); |
| |
| BlinkTransferableMessage transferable_message; |
| Transferables transferables; |
| scoped_refptr<SerializedScriptValue> serialized_message = |
| PostMessageHelper::SerializeMessageByMove(script_state->GetIsolate(), |
| message, options, transferables, |
| exception_state); |
| if (exception_state.HadException()) |
| return; |
| DCHECK(serialized_message); |
| transferable_message.message = serialized_message; |
| |
| // Disentangle the port in preparation for sending it to the remote context. |
| transferable_message.ports = MessagePort::DisentanglePorts( |
| ExecutionContext::From(script_state), transferables.message_ports, |
| exception_state); |
| if (exception_state.HadException()) |
| return; |
| transferable_message.user_activation = |
| PostMessageHelper::CreateUserActivationSnapshot(GetExecutionContext(), |
| options); |
| |
| transferable_message.sender_stack_trace_id = |
| ThreadDebugger::From(script_state->GetIsolate()) |
| ->StoreCurrentStackTrace("Worker.postMessage"); |
| context_proxy_->PostMessageToWorkerGlobalScope( |
| std::move(transferable_message)); |
| } |
| |
| // https://html.spec.whatwg.org/C/#worker-processing-model |
| void DedicatedWorker::Start() { |
| DCHECK(GetExecutionContext()->IsContextThread()); |
| |
| // This needs to be done after the UpdateStateIfNeeded is called as |
| // calling into the debugger can cause a breakpoint. |
| v8_stack_trace_id_ = ThreadDebugger::From(GetExecutionContext()->GetIsolate()) |
| ->StoreCurrentStackTrace("Worker Created"); |
| if (base::FeatureList::IsEnabled(features::kPlzDedicatedWorker)) { |
| // For classic script, always use "same-origin" credentials mode. |
| // https://html.spec.whatwg.org/C/#fetch-a-classic-worker-script |
| // For module script, respect the credentials mode specified by |
| // WorkerOptions. |
| // https://html.spec.whatwg.org/C/#workeroptions |
| auto credentials_mode = network::mojom::CredentialsMode::kSameOrigin; |
| if (options_->type() == "module") { |
| bool result = Request::ParseCredentialsMode(options_->credentials(), |
| &credentials_mode); |
| DCHECK(result); |
| } |
| |
| mojo::PendingRemote<mojom::blink::BlobURLToken> blob_url_token; |
| if (script_request_url_.ProtocolIs("blob")) { |
| GetExecutionContext()->GetPublicURLManager().Resolve( |
| script_request_url_, blob_url_token.InitWithNewPipeAndPassReceiver()); |
| } |
| |
| factory_client_->CreateWorkerHost( |
| script_request_url_, |
| WebSecurityOrigin(GetExecutionContext()->GetSecurityOrigin()), |
| credentials_mode, |
| WebSecurityOrigin( |
| outside_fetch_client_settings_object_->GetSecurityOrigin()), |
| outside_fetch_client_settings_object_->GetReferrerPolicy(), |
| KURL(outside_fetch_client_settings_object_->GetOutgoingReferrer()), |
| outside_fetch_client_settings_object_->GetInsecureRequestsPolicy(), |
| blob_url_token.PassPipe()); |
| // Continue in OnScriptLoadStarted() or OnScriptLoadStartFailed(). |
| return; |
| } |
| |
| factory_client_->CreateWorkerHostDeprecated( |
| WebSecurityOrigin(GetExecutionContext()->GetSecurityOrigin())); |
| |
| if (options_->type() == "classic") { |
| // Legacy code path (to be deprecated, see https://crbug.com/835717): |
| // A worker thread will start after scripts are fetched on the current |
| // thread. |
| classic_script_loader_ = MakeGarbageCollected<WorkerClassicScriptLoader>(); |
| classic_script_loader_->LoadTopLevelScriptAsynchronously( |
| *GetExecutionContext(), GetExecutionContext()->Fetcher(), |
| script_request_url_, mojom::RequestContextType::WORKER, |
| network::mojom::RequestMode::kSameOrigin, |
| network::mojom::CredentialsMode::kSameOrigin, |
| WTF::Bind(&DedicatedWorker::OnResponse, WrapPersistent(this)), |
| WTF::Bind(&DedicatedWorker::OnFinished, WrapPersistent(this))); |
| return; |
| } |
| if (options_->type() == "module") { |
| // Specify empty source code here because scripts will be fetched on the |
| // worker thread. |
| ContinueStart( |
| script_request_url_, OffMainThreadWorkerScriptFetchOption::kEnabled, |
| network::mojom::ReferrerPolicy::kDefault, |
| base::nullopt /* response_address_space */, String() /* source_code */); |
| return; |
| } |
| NOTREACHED() << "Invalid type: " << options_->type(); |
| } |
| |
| void DedicatedWorker::terminate() { |
| DCHECK(!GetExecutionContext() || GetExecutionContext()->IsContextThread()); |
| context_proxy_->TerminateGlobalScope(); |
| } |
| |
| BeginFrameProviderParams DedicatedWorker::CreateBeginFrameProviderParams() { |
| DCHECK(GetExecutionContext()->IsContextThread()); |
| // If we don't have a frame or we are not in Document, some of the SinkIds |
| // won't be initialized. If that's the case, the Worker will initialize it by |
| // itself later. |
| BeginFrameProviderParams begin_frame_provider_params; |
| if (auto* document = DynamicTo<Document>(GetExecutionContext())) { |
| LocalFrame* frame = document->GetFrame(); |
| if (frame) { |
| WebFrameWidgetBase* widget = |
| WebLocalFrameImpl::FromFrame(frame)->LocalRootFrameWidget(); |
| WebWidgetClient* client = widget->Client(); |
| begin_frame_provider_params.parent_frame_sink_id = |
| client->GetFrameSinkId(); |
| } |
| begin_frame_provider_params.frame_sink_id = |
| Platform::Current()->GenerateFrameSinkId(); |
| } |
| return begin_frame_provider_params; |
| } |
| |
| void DedicatedWorker::ContextDestroyed(ExecutionContext*) { |
| DCHECK(GetExecutionContext()->IsContextThread()); |
| if (classic_script_loader_) |
| classic_script_loader_->Cancel(); |
| factory_client_.reset(); |
| terminate(); |
| } |
| |
| bool DedicatedWorker::HasPendingActivity() const { |
| DCHECK(!GetExecutionContext() || GetExecutionContext()->IsContextThread()); |
| // The worker context does not exist while loading, so we must ensure that the |
| // worker object is not collected, nor are its event listeners. |
| return context_proxy_->HasPendingActivity() || classic_script_loader_; |
| } |
| |
| void DedicatedWorker::OnWorkerHostCreated( |
| mojo::ScopedMessagePipeHandle interface_provider, |
| mojo::ScopedMessagePipeHandle browser_interface_broker) { |
| DCHECK(!interface_provider_); |
| interface_provider_ = service_manager::mojom::blink::InterfaceProviderPtrInfo( |
| std::move(interface_provider), |
| service_manager::mojom::blink::InterfaceProvider::Version_); |
| |
| DCHECK(!browser_interface_broker_); |
| browser_interface_broker_ = |
| mojo::PendingRemote<mojom::blink::BrowserInterfaceBroker>( |
| std::move(browser_interface_broker), |
| mojom::blink::BrowserInterfaceBroker::Version_); |
| } |
| |
| void DedicatedWorker::OnScriptLoadStarted() { |
| DCHECK(base::FeatureList::IsEnabled(features::kPlzDedicatedWorker)); |
| // Specify empty source code here because scripts will be fetched on the |
| // worker thread. |
| ContinueStart( |
| script_request_url_, OffMainThreadWorkerScriptFetchOption::kEnabled, |
| network::mojom::ReferrerPolicy::kDefault, |
| base::nullopt /* response_address_space */, String() /* source_code */); |
| } |
| |
| void DedicatedWorker::OnScriptLoadStartFailed() { |
| DCHECK(base::FeatureList::IsEnabled(features::kPlzDedicatedWorker)); |
| context_proxy_->DidFailToFetchScript(); |
| factory_client_.reset(); |
| } |
| |
| void DedicatedWorker::DispatchErrorEventForScriptFetchFailure() { |
| DCHECK(!GetExecutionContext() || GetExecutionContext()->IsContextThread()); |
| // TODO(nhiroki): Add a console error message. |
| DispatchEvent(*Event::CreateCancelable(event_type_names::kError)); |
| } |
| |
| WorkerClients* DedicatedWorker::CreateWorkerClients() { |
| auto* worker_clients = MakeGarbageCollected<WorkerClients>(); |
| CoreInitializer::GetInstance().ProvideLocalFileSystemToWorker( |
| *worker_clients); |
| return worker_clients; |
| } |
| |
| std::unique_ptr<WebContentSettingsClient> |
| DedicatedWorker::CreateWebContentSettingsClient() { |
| std::unique_ptr<WebContentSettingsClient> content_settings_client; |
| if (auto* document = DynamicTo<Document>(GetExecutionContext())) { |
| LocalFrame* frame = document->GetFrame(); |
| return frame->Client()->CreateWorkerContentSettingsClient(); |
| } else if (GetExecutionContext()->IsWorkerGlobalScope()) { |
| WebContentSettingsClient* web_worker_content_settings_client = |
| To<WorkerGlobalScope>(GetExecutionContext())->ContentSettingsClient(); |
| if (web_worker_content_settings_client) |
| return web_worker_content_settings_client->Clone(); |
| } |
| return nullptr; |
| } |
| |
| void DedicatedWorker::OnResponse() { |
| DCHECK(GetExecutionContext()->IsContextThread()); |
| probe::DidReceiveScriptResponse(GetExecutionContext(), |
| classic_script_loader_->Identifier()); |
| } |
| |
| void DedicatedWorker::OnFinished() { |
| DCHECK(GetExecutionContext()->IsContextThread()); |
| if (classic_script_loader_->Canceled()) { |
| // Do nothing. |
| } else if (classic_script_loader_->Failed()) { |
| context_proxy_->DidFailToFetchScript(); |
| } else { |
| CountTopLevelScriptRequestUrlOriginType( |
| *GetExecutionContext()->GetSecurityOrigin(), script_request_url_); |
| |
| network::mojom::ReferrerPolicy referrer_policy = |
| network::mojom::ReferrerPolicy::kDefault; |
| if (!classic_script_loader_->GetReferrerPolicy().IsNull()) { |
| SecurityPolicy::ReferrerPolicyFromHeaderValue( |
| classic_script_loader_->GetReferrerPolicy(), |
| kDoNotSupportReferrerPolicyLegacyKeywords, &referrer_policy); |
| } |
| const KURL script_response_url = classic_script_loader_->ResponseURL(); |
| DCHECK(script_request_url_ == script_response_url || |
| SecurityOrigin::AreSameSchemeHostPort(script_request_url_, |
| script_response_url)); |
| ContinueStart( |
| script_response_url, OffMainThreadWorkerScriptFetchOption::kDisabled, |
| referrer_policy, classic_script_loader_->ResponseAddressSpace(), |
| classic_script_loader_->SourceText()); |
| probe::ScriptImported(GetExecutionContext(), |
| classic_script_loader_->Identifier(), |
| classic_script_loader_->SourceText()); |
| } |
| classic_script_loader_ = nullptr; |
| } |
| |
| void DedicatedWorker::ContinueStart( |
| const KURL& script_url, |
| OffMainThreadWorkerScriptFetchOption off_main_thread_fetch_option, |
| network::mojom::ReferrerPolicy referrer_policy, |
| base::Optional<network::mojom::IPAddressSpace> response_address_space, |
| const String& source_code) { |
| context_proxy_->StartWorkerGlobalScope( |
| CreateGlobalScopeCreationParams(script_url, off_main_thread_fetch_option, |
| referrer_policy, response_address_space), |
| options_, script_url, *outside_fetch_client_settings_object_, |
| v8_stack_trace_id_, source_code); |
| } |
| |
| std::unique_ptr<GlobalScopeCreationParams> |
| DedicatedWorker::CreateGlobalScopeCreationParams( |
| const KURL& script_url, |
| OffMainThreadWorkerScriptFetchOption off_main_thread_fetch_option, |
| network::mojom::ReferrerPolicy referrer_policy, |
| base::Optional<network::mojom::IPAddressSpace> response_address_space) { |
| base::UnguessableToken parent_devtools_token; |
| std::unique_ptr<WorkerSettings> settings; |
| if (auto* document = DynamicTo<Document>(GetExecutionContext())) { |
| if (document->GetFrame()) |
| parent_devtools_token = document->GetFrame()->GetDevToolsFrameToken(); |
| settings = std::make_unique<WorkerSettings>(document->GetSettings()); |
| } else { |
| WorkerGlobalScope* worker_global_scope = |
| To<WorkerGlobalScope>(GetExecutionContext()); |
| parent_devtools_token = |
| worker_global_scope->GetThread()->GetDevToolsWorkerToken(); |
| settings = WorkerSettings::Copy(worker_global_scope->GetWorkerSettings()); |
| } |
| |
| mojom::ScriptType script_type = (options_->type() == "classic") |
| ? mojom::ScriptType::kClassic |
| : mojom::ScriptType::kModule; |
| |
| DCHECK(interface_provider_); |
| return std::make_unique<GlobalScopeCreationParams>( |
| script_url, script_type, off_main_thread_fetch_option, options_->name(), |
| GetExecutionContext()->UserAgent(), CreateWebWorkerFetchContext(), |
| GetExecutionContext()->GetContentSecurityPolicy()->Headers(), |
| referrer_policy, GetExecutionContext()->GetSecurityOrigin(), |
| GetExecutionContext()->IsSecureContext(), |
| GetExecutionContext()->GetHttpsState(), CreateWorkerClients(), |
| CreateWebContentSettingsClient(), response_address_space, |
| OriginTrialContext::GetTokens(GetExecutionContext()).get(), |
| parent_devtools_token, std::move(settings), kV8CacheOptionsDefault, |
| nullptr /* worklet_module_responses_map */, |
| std::move(interface_provider_), std::move(browser_interface_broker_), |
| CreateBeginFrameProviderParams(), |
| GetExecutionContext()->GetSecurityContext().GetFeaturePolicy(), |
| GetExecutionContext()->GetAgentClusterID()); |
| } |
| |
| scoped_refptr<WebWorkerFetchContext> |
| DedicatedWorker::CreateWebWorkerFetchContext() { |
| // This worker is being created by the document. |
| if (auto* document = DynamicTo<Document>(GetExecutionContext())) { |
| scoped_refptr<WebWorkerFetchContext> web_worker_fetch_context; |
| LocalFrame* frame = document->GetFrame(); |
| if (base::FeatureList::IsEnabled(features::kPlzDedicatedWorker)) { |
| web_worker_fetch_context = |
| frame->Client()->CreateWorkerFetchContextForPlzDedicatedWorker( |
| factory_client_.get()); |
| } else { |
| web_worker_fetch_context = frame->Client()->CreateWorkerFetchContext(); |
| } |
| web_worker_fetch_context->SetIsOnSubframe(!frame->IsMainFrame()); |
| return web_worker_fetch_context; |
| } |
| |
| // This worker is being created by an existing worker (i.e., nested workers). |
| // Clone the worker fetch context from the parent's one. |
| auto* scope = To<WorkerGlobalScope>(GetExecutionContext()); |
| return factory_client_->CloneWorkerFetchContext( |
| static_cast<WorkerFetchContext&>(scope->Fetcher()->Context()) |
| .GetWebWorkerFetchContext(), |
| scope->GetTaskRunner(TaskType::kNetworking)); |
| } |
| |
| const AtomicString& DedicatedWorker::InterfaceName() const { |
| return event_target_names::kWorker; |
| } |
| |
| void DedicatedWorker::ContextLifecycleStateChanged( |
| mojom::FrameLifecycleState state) { |
| DCHECK(GetExecutionContext()->IsContextThread()); |
| switch (state) { |
| case mojom::FrameLifecycleState::kPaused: |
| // Do not do anything in this case. kPaused is only used |
| // for when the main thread is paused we shouldn't worry |
| // about pausing the worker thread in this case. |
| break; |
| case mojom::FrameLifecycleState::kFrozen: |
| case mojom::FrameLifecycleState::kFrozenAutoResumeMedia: |
| factory_client_->LifecycleStateChanged(state); |
| if (!requested_frozen_) { |
| requested_frozen_ = true; |
| context_proxy_->Freeze(); |
| } |
| break; |
| case mojom::FrameLifecycleState::kRunning: |
| factory_client_->LifecycleStateChanged(state); |
| if (requested_frozen_) { |
| context_proxy_->Resume(); |
| requested_frozen_ = false; |
| } |
| break; |
| } |
| } |
| |
| void DedicatedWorker::Trace(blink::Visitor* visitor) { |
| visitor->Trace(options_); |
| visitor->Trace(outside_fetch_client_settings_object_); |
| visitor->Trace(context_proxy_); |
| visitor->Trace(classic_script_loader_); |
| AbstractWorker::Trace(visitor); |
| } |
| |
| } // namespace blink |
