SyntheticGestureTarget implementation for injecting synthetic input events

content/port/browser/render_widget_host_view_port.h

Index: content/port/browser/render_widget_host_view_port.h
diff --git a/content/port/browser/render_widget_host_view_port.h b/content/port/browser/render_widget_host_view_port.h
index f9444b3fe3efdca34ced3389ad9099a5dc208b36..3225612df3ea2688c78012bab5c02270fd38f705 100644
--- a/content/port/browser/render_widget_host_view_port.h
+++ b/content/port/browser/render_widget_host_view_port.h
@@ -6,6 +6,7 @@
 #define CONTENT_PORT_BROWSER_RENDER_WIDGET_HOST_VIEW_PORT_H_
 
 #include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/process/kill.h"
 #include "base/strings/string16.h"
 #include "cc/output/compositor_frame.h"
@@ -42,6 +43,7 @@ namespace content {
 class BackingStore;
 class RenderWidgetHostViewFrameSubscriber;
 class SyntheticGesture;
+class SyntheticGestureTarget;
 struct WebPluginGeometry;
 struct NativeWebKeyboardEvent;
 
@@ -298,6 +300,8 @@ class CONTENT_EXPORT RenderWidgetHostViewPort : public RenderWidgetHostView,
   // Called by the host when the input flush has completed.
   virtual void OnDidFlushInput() = 0;
 
+  virtual scoped_ptr<SyntheticGestureTarget> CreateSyntheticGestureTarget() = 0;

[jam, 2013/11/06 17:47:26]

nit: please add a comment

+
   virtual void GestureEventAck(int gesture_event_type,
                                InputEventAckState ack_result) = 0;