Ensure acks are sent for all blocking events.

content/renderer/input/input_handler_manager.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_RENDERER_INPUT_INPUT_HANDLER_MANAGER_H_
 #define CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_H_
 
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 49 matching lines @@
 
   void RegisterRoutingID(int routing_id);
   void UnregisterRoutingID(int routing_id);
 
   void ObserveGestureEventAndResultOnMainThread(
       int routing_id,
       const blink::WebGestureEvent& gesture_event,
       const cc::InputHandlerScrollResult& scroll_result);
 
   void NotifyInputEventHandledOnMainThread(int routing_id,
-                                           blink::WebInputEvent::Type);
+                                           blink::WebInputEvent::Type,
+                                           InputEventAckState);
 
   // Callback only from the compositor's thread.
   void RemoveInputHandler(int routing_id);
 
   // Called from the compositor's thread.
   virtual InputEventAckState HandleInputEvent(
       int routing_id,
       const blink::WebInputEvent* input_event,
       ui::LatencyInfo* latency_info);
 
@@ skipping 23 matching lines @@
       int routing_id,
       const blink::WebMouseWheelEvent& wheel_event,
       const cc::InputHandlerScrollResult& scroll_result);
 
   void ObserveGestureEventAndResultOnCompositorThread(
       int routing_id,
       const blink::WebGestureEvent& gesture_event,
       const cc::InputHandlerScrollResult& scroll_result);
 
   void NotifyInputEventHandledOnCompositorThread(int routing_id,
-                                                 blink::WebInputEvent::Type);
+                                                 blink::WebInputEvent::Type,
+                                                 InputEventAckState);
 
   typedef base::ScopedPtrHashMap<int,  // routing_id
                                  std::unique_ptr<InputHandlerWrapper>>
       InputHandlerMap;
   InputHandlerMap input_handlers_;
 
   const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   InputHandlerManagerClient* const client_;
   // May be null.
   SynchronousInputHandlerProxyClient* const synchronous_handler_proxy_client_;
   scheduler::RendererScheduler* const renderer_scheduler_;  // Not owned.
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_H_