input: Dispatch synthesized events at regular intervals.

content/browser/renderer_host/input/synthetic_gesture_controller.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_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_CONTROLLER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_CONTROLLER_H_
 
 #include <memory>
 #include <queue>
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
+#include "base/timer/timer.h"
 #include "content/browser/renderer_host/input/synthetic_gesture.h"
 #include "content/common/content_export.h"
 #include "content/common/input/synthetic_gesture_params.h"
 
 namespace content {
 
 class SyntheticGestureTarget;
 
 // Controls a synthetic gesture.
 // Repeatedly invokes the gesture object's ForwardInputEvent method to send
@@ skipping 20 matching lines @@
 
   typedef base::Callback<void(SyntheticGesture::Result)>
       OnGestureCompleteCallback;
   void QueueSyntheticGesture(
       std::unique_ptr<SyntheticGesture> synthetic_gesture,
       const OnGestureCompleteCallback& completion_callback);
 
   bool DispatchNextEvent(base::TimeTicks = base::TimeTicks::Now());
 
  private:
-  void RequestBeginFrame();
+  void RequestBeginFrameIfNecessary();
   void OnBeginFrame();
+  void StartTimer();
 
   void StartGesture(const SyntheticGesture& gesture);
   void StopGesture(const SyntheticGesture& gesture,
                    const OnGestureCompleteCallback& completion_callback,
                    SyntheticGesture::Result result);
 
   Delegate* const delegate_;
   std::unique_ptr<SyntheticGestureTarget> gesture_target_;
 
   // A queue of gesture/callback pairs.  Implemented as two queues to
@@ skipping 35 matching lines @@
 
    private:
     SyntheticGesture::Result result_of_current_gesture_ =
         SyntheticGesture::GESTURE_RUNNING;
     std::vector<std::unique_ptr<SyntheticGesture>> gestures_;
     std::queue<OnGestureCompleteCallback> callbacks_;
 
     DISALLOW_COPY_AND_ASSIGN(GestureAndCallbackQueue);
   } pending_gesture_queue_;
 
+  base::RepeatingTimer dispatch_timer_;
   base::WeakPtrFactory<SyntheticGestureController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyntheticGestureController);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_CONTROLLER_H_