sync compositor: Make OnComputeScroll async IPC

content/renderer/android/synchronous_compositor_proxy.h

 // Copyright 2015 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_ANDROID_SYNCHRONOUS_COMPOSITOR_PROXY_H_
 #define CONTENT_RENDERER_ANDROID_SYNCHRONOUS_COMPOSITOR_PROXY_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 71 matching lines @@
 
   // IPC handlers.
   void HandleInputEvent(
       const SyncCompositorCommonBrowserParams& common_params,
       const blink::WebInputEvent* event,
       SyncCompositorCommonRendererParams* common_renderer_params,
       InputEventAckState* ack);
   void BeginFrame(const SyncCompositorCommonBrowserParams& common_params,
                   const cc::BeginFrameArgs& args,
                   SyncCompositorCommonRendererParams* common_renderer_params);
-  void OnComputeScroll(
-      const SyncCompositorCommonBrowserParams& common_params,
-      base::TimeTicks animation_time,
-      SyncCompositorCommonRendererParams* common_renderer_params);
+  void OnComputeScroll(const SyncCompositorCommonBrowserParams& common_params,
+                       base::TimeTicks animation_time);
   void DemandDrawHw(const SyncCompositorCommonBrowserParams& common_params,
                     const SyncCompositorDemandDrawHwParams& params,
                     IPC::Message* reply_message);
   void SetSharedMemory(
       const SyncCompositorCommonBrowserParams& common_params,
       const SyncCompositorSetSharedMemoryParams& params,
       bool* success,
       SyncCompositorCommonRendererParams* common_renderer_params);
   void ZeroSharedMemory();
   void DemandDrawSw(const SyncCompositorCommonBrowserParams& common_params,
@@ skipping 38 matching lines @@
   bool need_invalidate_;
   bool need_begin_frame_;
   bool did_activate_pending_tree_;
 
   DISALLOW_COPY_AND_ASSIGN(SynchronousCompositorProxy);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_ANDROID_SYNCHRONOUS_COMPOSITOR_PROXY_H_