[Reland] Post loading tasks on the appropriate WebFrameScheduler's queue

content/child/blink_platform_impl.h

 // Copyright 2014 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.
 
 #ifndef CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_
 #define CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/threading/thread_local_storage.h"
@@ skipping 171 matching lines @@
   blink::WebServicePortProvider* createServicePortProvider(
       blink::WebServicePortProviderClient*) override;
   blink::WebPermissionClient* permissionClient() override;
   blink::WebSyncProvider* backgroundSyncProvider() override;
 
   blink::WebString domCodeStringFromEnum(int dom_code) override;
   int domEnumFromCodeString(const blink::WebString& codeString) override;
   blink::WebString domKeyStringFromEnum(int dom_key) override;
   int domKeyEnumFromString(const blink::WebString& key_string) override;
 
+ protected:
+  virtual scoped_refptr<base::SingleThreadTaskRunner>
+  LoadingTaskRunnerForCurrentThread();
+
  private:
   void InternalInit();
   void UpdateWebThreadTLS(blink::WebThread* thread);
 
   bool IsMainThread() const;
 
-  scoped_refptr<base::SingleThreadTaskRunner> MainTaskRunnerForCurrentThread();
-
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
   WebThemeEngineImpl native_theme_engine_;
   WebFallbackThemeEngineImpl fallback_theme_engine_;
   base::ThreadLocalStorage::Slot current_thread_slot_;
   webcrypto::WebCryptoImpl web_crypto_;
   scoped_ptr<WebGeofencingProviderImpl> geofencing_provider_;
   base::ScopedPtrHashMap<blink::WebMemoryDumpProvider*,
                          scoped_ptr<WebMemoryDumpProviderAdapter>>
       memory_dump_providers_;
 
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
   scoped_refptr<NotificationDispatcher> notification_dispatcher_;
   scoped_refptr<PushDispatcher> push_dispatcher_;
   scoped_ptr<PermissionDispatcher> permission_client_;
   scoped_ptr<BackgroundSyncProvider> sync_provider_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_