Fix WebView compositor input handling

content/browser/android/in_process/synchronous_compositor_impl.h

Index: content/browser/android/in_process/synchronous_compositor_impl.h
diff --git a/content/browser/android/in_process/synchronous_compositor_impl.h b/content/browser/android/in_process/synchronous_compositor_impl.h
index 3659ca01d28148cbd7a0e190beac55ab88441362..c6aced8e34e7533594e556e3686f197196280a76 100644
--- a/content/browser/android/in_process/synchronous_compositor_impl.h
+++ b/content/browser/android/in_process/synchronous_compositor_impl.h
@@ -9,9 +9,14 @@
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/android/in_process/synchronous_compositor_output_surface.h"
+#include "content/port/common/input_event_ack_state.h"
 #include "content/public/browser/android/synchronous_compositor.h"
 #include "content/public/browser/web_contents_user_data.h"
 
+namespace WebKit {
+class WebInputEvent;
+}
+
 namespace content {
 
 // The purpose of this class is to act as the intermediary between the various
@@ -24,8 +29,14 @@ class SynchronousCompositorImpl
       public SynchronousCompositorOutputSurfaceDelegate,
       public WebContentsUserData<SynchronousCompositorImpl> {
  public:
+  // When used from browser code, use both |process_id| and |routing_id|.
+  static SynchronousCompositorImpl* FromID(int process_id, int routing_id);
+  // When handling upcalls from renderer code, use this version; the process id
+  // is implicitly that of the in-process renderer.
   static SynchronousCompositorImpl* FromRoutingID(int routing_id);
 
+  InputEventAckState HandleInputEvent(const WebKit::WebInputEvent& input_event);
+
   // SynchronousCompositor
   virtual bool IsHwReady() OVERRIDE;
   virtual void SetClient(SynchronousCompositorClient* compositor_client)