Expose different task runner in RenderFrame for convenience

content/renderer/render_frame_impl.h

 // Copyright 2013 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_RENDERER_RENDER_FRAME_IMPL_H_
 #define CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <deque>
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/gtest_prod_util.h"
 #include "base/id_map.h"
 #include "base/macros.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/process/process_handle.h"
+#include "base/single_thread_task_runner.h"
 #include "build/build_config.h"
 #include "content/common/accessibility_mode_enums.h"
 #include "content/common/associated_interface_registry_impl.h"
 #include "content/common/download/mhtml_save_status.h"
 #include "content/common/frame.mojom.h"
 #include "content/common/frame_message_enums.h"
 #include "content/common/host_zoom.mojom.h"
 #include "content/common/renderer.mojom.h"
 #include "content/public/common/console_message_level.h"
 #include "content/public/common/javascript_message_type.h"
@@ skipping 410 matching lines @@
                        size_t offset,
                        const gfx::Range& range) override;
   void EnsureMojoBuiltinsAreAvailable(v8::Isolate* isolate,
                                       v8::Local<v8::Context> context) override;
   void AddMessageToConsole(ConsoleMessageLevel level,
                            const std::string& message) override;
   PreviewsState GetPreviewsState() const override;
   bool IsPasting() const override;
   blink::WebPageVisibilityState GetVisibilityState() const override;
   bool IsBrowserSideNavigationPending() override;
+  base::SingleThreadTaskRunner* GetTimerTaskRunner() override;
+  base::SingleThreadTaskRunner* GetLoadingTaskRunner() override;
+  base::SingleThreadTaskRunner* GetUnthrottledTaskRunner() override;
 
   // blink::mojom::EngagementClient implementation:
   void SetEngagementLevel(const url::Origin& origin,
                           blink::mojom::EngagementLevel level) override;
 
   // mojom::Frame implementation:
   void GetInterfaceProvider(
       service_manager::mojom::InterfaceProviderRequest request) override;
 
   // mojom::HostZoom implementation:
@@ skipping 910 matching lines @@
   bool browser_side_navigation_pending_ = false;
 
   base::WeakPtrFactory<RenderFrameImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_IMPL_H_