Introduce ThreadableLoadingContext: make threaded loading code one step away from Document

third_party/WebKit/Source/web/WebEmbeddedWorkerImpl.cpp

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 12 matching lines @@
  * 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.
  */
 
 #include "web/WebEmbeddedWorkerImpl.h"
 
+#include <memory>
 #include "bindings/core/v8/SourceLocation.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExecutionContextTask.h"
 #include "core/dom/SecurityContext.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/loader/FrameLoadRequest.h"
+#include "core/loader/ThreadableLoadingContext.h"
 #include "core/workers/ParentFrameTaskRunners.h"
 #include "core/workers/WorkerClients.h"
 #include "core/workers/WorkerGlobalScope.h"
 #include "core/workers/WorkerInspectorProxy.h"
 #include "core/workers/WorkerLoaderProxy.h"
 #include "core/workers/WorkerScriptLoader.h"
 #include "core/workers/WorkerThreadStartupData.h"
 #include "modules/serviceworkers/ServiceWorkerContainerClient.h"
 #include "modules/serviceworkers/ServiceWorkerThread.h"
 #include "platform/Histogram.h"
@@ skipping 15 matching lines @@
 #include "public/web/modules/serviceworker/WebServiceWorkerContextClient.h"
 #include "public/web/modules/serviceworker/WebServiceWorkerNetworkProvider.h"
 #include "web/IndexedDBClientImpl.h"
 #include "web/ServiceWorkerGlobalScopeClientImpl.h"
 #include "web/ServiceWorkerGlobalScopeProxy.h"
 #include "web/WebDataSourceImpl.h"
 #include "web/WebLocalFrameImpl.h"
 #include "web/WorkerContentSettingsClient.h"
 #include "wtf/Functional.h"
 #include "wtf/PtrUtil.h"
-#include <memory>
 
 namespace blink {
 
 WebEmbeddedWorker* WebEmbeddedWorker::create(
     WebServiceWorkerContextClient* client,
     WebWorkerContentSettingsClientProxy* contentSettingsClient) {
   return new WebEmbeddedWorkerImpl(WTF::wrapUnique(client),
                                    WTF::wrapUnique(contentSettingsClient));
 }
 
@@ skipping 181 matching lines @@
 }
 
 void WebEmbeddedWorkerImpl::postTaskToWorkerGlobalScope(
     const WebTraceLocation& location,
     std::unique_ptr<WTF::CrossThreadClosure> task) {
   if (m_askedToTerminate || !m_workerThread)
     return;
   m_workerThread->postTask(location, std::move(task));
 }
 
-ExecutionContext* WebEmbeddedWorkerImpl::getLoaderExecutionContext() {
-  return m_mainFrame->frame()->document();
+ThreadableLoadingContext* WebEmbeddedWorkerImpl::getThreadableLoadingContext() {
+  if (!m_loadingContext) {
+    m_loadingContext =
+        ThreadableLoadingContext::create(*m_mainFrame->frame()->document());
+  }
+  return m_loadingContext;
 }
 
 void WebEmbeddedWorkerImpl::prepareShadowPageForLoader() {
   // Create 'shadow page', which is never displayed and is used mainly to
   // provide a context for loading on the main thread.
   //
   // FIXME: This does mostly same as WebSharedWorkerImpl::initializeLoader.
   // This code, and probably most of the code in this class should be shared
   // with SharedWorker.
   DCHECK(!m_webView);
@@ skipping 184 matching lines @@
       *this, *document, *m_workerContextClient);
   m_loaderProxy = WorkerLoaderProxy::create(this);
   m_workerThread =
       ServiceWorkerThread::create(m_loaderProxy, *m_workerGlobalScopeProxy);
   m_workerThread->start(std::move(startupData), m_mainThreadTaskRunners.get());
   m_workerInspectorProxy->workerThreadCreated(document, m_workerThread.get(),
                                               scriptURL);
 }
 
 }  // namespace blink