Teach main thread event queue about closures.

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 <unordered_map>
 
 #include "base/memory/ref_counted.h"
@@ skipping 76 matching lines @@
       base::Callback<void(InputEventAckState,
                           ui::WebScopedInputEvent,
                           const ui::LatencyInfo&,
                           std::unique_ptr<ui::DidOverscrollParams>)>;
   // Called from the compositor's thread.
   virtual void HandleInputEvent(int routing_id,
                                 ui::WebScopedInputEvent input_event,
                                 const ui::LatencyInfo& latency_info,
                                 const InputEventAckStateCallback& callback);
 
+  virtual void QueueClosureForMainThreadEventQueue(
+      int routing_id,
+      const base::Closure& closure);
   // Called from the compositor's thread.
   void DidOverscroll(int routing_id, const ui::DidOverscrollParams& params);
 
   // Called from the compositor's thread.
   void DidStopFlinging(int routing_id);
 
   // Called from the compositor's thread.
   void DidAnimateForInput();
 
   // Called from the compositor's thread.
@@ skipping 44 matching lines @@
   // May be null.
   SynchronousInputHandlerProxyClient* const synchronous_handler_proxy_client_;
   blink::scheduler::RendererScheduler* const renderer_scheduler_;  // Not owned.
 
   base::WeakPtrFactory<InputHandlerManager> weak_ptr_factory_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_H_