[scheduler] Remove blink::scheduler::TaskQueue from public API.

third_party/WebKit/public/platform/scheduler/renderer/renderer_scheduler.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 THIRD_PARTY_WEBKIT_PUBLIC_PLATFORM_SCHEDULER_RENDERER_RENDERER_SCHEDULER_H_
 #define THIRD_PARTY_WEBKIT_PUBLIC_PLATFORM_SCHEDULER_RENDERER_RENDERER_SCHEDULER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 32 matching lines @@
   class BLINK_PLATFORM_EXPORT RAILModeObserver {
    public:
     virtual ~RAILModeObserver();
     virtual void OnRAILModeChanged(v8::RAILMode rail_mode) = 0;
   };
 
   ~RendererScheduler() override;
   static std::unique_ptr<RendererScheduler> Create();
 
   // Returns the compositor task runner.
-  virtual scoped_refptr<TaskQueue> CompositorTaskRunner() = 0;
+  virtual scoped_refptr<base::SingleThreadTaskRunner>
+  CompositorTaskRunner() = 0;
 
   // Creates a WebThread implementation for the renderer main thread.
   virtual std::unique_ptr<WebThread> CreateMainThread() = 0;
 
   // Returns the loading task runner.  This queue is intended for tasks related
   // to resource dispatch, foreground HTML parsing, etc...
-  virtual scoped_refptr<TaskQueue> LoadingTaskRunner() = 0;
+  virtual scoped_refptr<base::SingleThreadTaskRunner> LoadingTaskRunner() = 0;
 
   // Returns the timer task runner.  This queue is intended for DOM Timers.
   // TODO(alexclarke): Get rid of this default timer queue.
-  virtual scoped_refptr<TaskQueue> TimerTaskRunner() = 0;
-
-  // Returns a new loading task runner. This queue is intended for tasks related
-  // to resource dispatch, foreground HTML parsing, etc...
-  virtual scoped_refptr<TaskQueue> NewLoadingTaskRunner(
-      TaskQueue::QueueType queue_type) = 0;
-
-  // Returns a new timer task runner. This queue is intended for DOM Timers.
-  virtual scoped_refptr<TaskQueue> NewTimerTaskRunner(
-      TaskQueue::QueueType queue_type) = 0;
-
-  // Returns a task runner for tasks which should never get throttled.
-  virtual scoped_refptr<TaskQueue> NewUnthrottledTaskRunner(
-      TaskQueue::QueueType queue_type) = 0;
+  virtual scoped_refptr<base::SingleThreadTaskRunner> TimerTaskRunner() = 0;
 
   // Returns a new RenderWidgetSchedulingState.  The signals from this will be
   // used to make scheduling decisions.
   virtual std::unique_ptr<RenderWidgetSchedulingState>
   NewRenderWidgetSchedulingState() = 0;
 
   // Called to notify about the start of an extended period where no frames
   // need to be drawn. Must be called from the main thread.
   virtual void BeginFrameNotExpectedSoon() = 0;
 
@@ skipping 108 matching lines @@
 
  protected:
   RendererScheduler();
   DISALLOW_COPY_AND_ASSIGN(RendererScheduler);
 };
 
 }  // namespace scheduler
 }  // namespace blink
 
 #endif  // THIRD_PARTY_WEBKIT_PUBLIC_PLATFORM_SCHEDULER_RENDERER_RENDERER_SCHEDULER_H_