sync compositor: Async scroll offset IPC

content/common/android/sync_compositor_messages.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/common/android/sync_compositor_messages.h"
 
 namespace content {
 
 SyncCompositorCommonBrowserParams::SyncCompositorCommonBrowserParams()
-    : update_root_scroll_offset(false),
-      begin_frame_source_paused(false) {}
+    : begin_frame_source_paused(false) {}
 
 SyncCompositorCommonBrowserParams::~SyncCompositorCommonBrowserParams() {}
 
 SyncCompositorDemandDrawHwParams::SyncCompositorDemandDrawHwParams() {}
 
 SyncCompositorDemandDrawHwParams::SyncCompositorDemandDrawHwParams(
     const gfx::Size& surface_size,
     const gfx::Transform& transform,
     const gfx::Rect& viewport,
     const gfx::Rect& clip,
@@ skipping 21 matching lines @@
       min_page_scale_factor(0.f),
       max_page_scale_factor(0.f),
       need_animate_scroll(false),
       need_invalidate_count(0u),
       need_begin_frame(false),
       did_activate_pending_tree_count(0u) {}
 
 SyncCompositorCommonRendererParams::~SyncCompositorCommonRendererParams() {}
 
 }  // namespace content