Quad list IPC infrastructure.

content/renderer/gpu/compositor_thread.h

Index: content/renderer/gpu/compositor_thread.h
diff --git a/content/renderer/gpu/compositor_thread.h b/content/renderer/gpu/compositor_thread.h
index aed3afd51249b1a02061e8d8d239d2f31b2640da..4bddaa83504d90824c7d29b4fb56323b12e75323 100644
--- a/content/renderer/gpu/compositor_thread.h
+++ b/content/renderer/gpu/compositor_thread.h
@@ -35,6 +35,7 @@ class CompositorThread {
 
   // Callable from the main thread only.
   void AddInputHandler(int routing_id,
+                       IPC::Message::Sender* sender,
                        int input_handler_id,
                        const base::WeakPtr<RenderViewImpl>& render_view_impl);
 
@@ -51,6 +52,7 @@ class CompositorThread {
   // Called from the compositor's thread.
   void AddInputHandlerOnCompositorThread(
       int routing_id,
+      IPC::Message::Sender* sender,
       int input_handler_id,
       scoped_refptr<base::MessageLoopProxy> main_loop,
       const base::WeakPtr<RenderViewImpl>& render_view_impl);