sync compositor: Merge input path with chrome

content/renderer/input/input_handler_manager_client.h

Index: content/renderer/input/input_handler_manager_client.h
diff --git a/content/renderer/input/input_handler_manager_client.h b/content/renderer/input/input_handler_manager_client.h
index c794bd2353a32989095bb5f177e26e49951c0b3f..71dc3e9e573a49a699ca52a364d7883e9f4f07b7 100644
--- a/content/renderer/input/input_handler_manager_client.h
+++ b/content/renderer/input/input_handler_manager_client.h
@@ -44,9 +44,7 @@ class CONTENT_EXPORT InputHandlerManagerClient {
   virtual void SetBoundHandler(const Handler& handler) = 0;
 
   // Called from the compositor thread.
-  virtual void DidAddInputHandler(
-      int routing_id,
-      ui::SynchronousInputHandlerProxy* synchronous_handler) = 0;
+  virtual void DidAddInputHandler(int routing_id) = 0;
   virtual void DidRemoveInputHandler(int routing_id) = 0;
   virtual void DidOverscroll(int routing_id,
                              const DidOverscrollParams& params) = 0;
@@ -62,6 +60,22 @@ class CONTENT_EXPORT InputHandlerManagerClient {
   DISALLOW_COPY_AND_ASSIGN(InputHandlerManagerClient);
 };
 
+class CONTENT_EXPORT SynchronousInputHandlerProxyClient {
+ public:
+  virtual ~SynchronousInputHandlerProxyClient() {}
+
+  virtual void DidAddSynchronousHandlerProxy(
+      int routing_id,
+      ui::SynchronousInputHandlerProxy* synchronous_handler) = 0;
+  virtual void DidRemoveSynchronousHandlerProxy(int routing_id) = 0;
+
+ protected:
+  SynchronousInputHandlerProxyClient() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SynchronousInputHandlerProxyClient);
+};
+
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_CLIENT_H_