EventSender::GestureFlingStart takes a source_device.

content/shell/renderer/test_runner/event_sender.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_SHELL_RENDERER_TEST_RUNNER_EVENT_SENDER_H_
 #define CONTENT_SHELL_RENDERER_TEST_RUNNER_EVENT_SENDER_H_
 
 #include <queue>
 #include <string>
 #include <vector>
@@ skipping 97 matching lines @@
   void ReleaseTouchPoint(unsigned index);
   void UpdateTouchPoint(unsigned index, float x, float y);
   void CancelTouchPoint(unsigned index);
   void SetTouchModifier(const std::string& key_name, bool set_mask);
   void SetTouchCancelable(bool cancelable);
   void ThrowTouchPointError();
 
   void DumpFilenameBeingDragged();
 
   void GestureFlingCancel();
-  void GestureFlingStart(float x, float y, float velocity_x, float velocity_y);
+  void GestureFlingStart(float x,
+                         float y,
+                         float velocity_x,
+                         float velocity_y,
+                         gin::Arguments* args);
   void GestureScrollFirstPoint(int x, int y);
 
   void TouchStart();
   void TouchMove();
   void TouchCancel();
   void TouchEnd();
 
   void LeapForward(int milliseconds);
 
   void BeginDragWithFiles(const std::vector<std::string>& files);
@@ skipping 150 matching lines @@
   int click_count_;
 
   base::WeakPtrFactory<EventSender> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EventSender);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_RENDERER_TEST_RUNNER_EVENT_SENDER_H_