sync compositor: Make OnComputeScroll async IPC

content/browser/android/synchronous_compositor_host.cc

 // 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.
 
 #include "content/browser/android/synchronous_compositor_host.h"
 
 #include <utility>
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/shared_memory.h"
@@ skipping 260 matching lines @@
 
 void SynchronousCompositorHost::OnComputeScroll(
     base::TimeTicks animation_time) {
   if (!need_animate_scroll_)
     return;
   need_animate_scroll_ = false;
 
   SyncCompositorCommonBrowserParams common_browser_params;
   PopulateCommonParams(&common_browser_params);
   SyncCompositorCommonRendererParams common_renderer_params;
-  if (!sender_->Send(new SyncCompositorMsg_ComputeScroll(
-          routing_id_, common_browser_params, animation_time,
-          &common_renderer_params))) {
-    return;
-  }
-  ProcessCommonParams(common_renderer_params);
+  sender_->Send(new SyncCompositorMsg_ComputeScroll(
+      routing_id_, common_browser_params, animation_time));
 }
 
 InputEventAckState SynchronousCompositorHost::HandleInputEvent(
     const blink::WebInputEvent& input_event) {
   SyncCompositorCommonBrowserParams common_browser_params;
   PopulateCommonParams(&common_browser_params);
   SyncCompositorCommonRendererParams common_renderer_params;
   InputEventAckState ack = INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
   if (!sender_->Send(new SyncCompositorMsg_HandleInputEvent(
           routing_id_, common_browser_params, &input_event,
@@ skipping 82 matching lines @@
         params.scrollable_size, params.page_scale_factor,
         params.min_page_scale_factor, params.max_page_scale_factor);
   }
 }
 
 void SynchronousCompositorHost::UpdateNeedsBeginFrames() {
   rwhva_->OnSetNeedsBeginFrames(is_active_ && need_begin_frame_);
 }
 
 }  // namespace content