Remove RenderWidget::SetBackground, change IPC to pass a bool.

content/browser/renderer_host/render_widget_host_view_android.cc

 // Copyright (c) 2012 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/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include "base/android/sys_utils.h"
 #include "base/basictypes.h"
@@ skipping 650 matching lines @@
 void RenderWidgetHostViewAndroid::SelectionRootBoundsChanged(
     const gfx::Rect& bounds) {
   if (content_view_core_) {
     content_view_core_->OnSelectionRootBoundsChanged(bounds);
   }
 }
 
 void RenderWidgetHostViewAndroid::ScrollOffsetChanged() {
 }
 
-void RenderWidgetHostViewAndroid::SetBackground(const SkBitmap& background) {
-  RenderWidgetHostViewBase::SetBackground(background);
-  host_->Send(new ViewMsg_SetBackground(host_->GetRoutingID(), background));
+void RenderWidgetHostViewAndroid::SetBackgroundOpaque(bool opaque) {
+  RenderWidgetHostViewBase::SetBackgroundOpaque(opaque);
+  host_->Send(new ViewMsg_SetBackgroundOpaque(host_->GetRoutingID(), opaque));

[piman, 2014/05/07 00:29:56]

nit: host_->SetBackgroundOpaque(opaque) ? That way there is a single sender of
this message.

[danakj, 2014/05/07 17:08:17]

Done.

 }
 
 void RenderWidgetHostViewAndroid::CopyFromCompositingSurface(
     const gfx::Rect& src_subrect,
     const gfx::Size& dst_size,
     const base::Callback<void(bool, const SkBitmap&)>& callback,
     const SkBitmap::Config bitmap_config) {
   if (!IsReadbackConfigSupported(bitmap_config)) {
     callback.Run(false, SkBitmap());
     return;
@@ skipping 772 matching lines @@
   results->availableRect = display.work_area();
   results->deviceScaleFactor = display.device_scale_factor();
   results->orientationAngle = display.RotationAsDegree();
   gfx::DeviceDisplayInfo info;
   results->depth = info.GetBitsPerPixel();
   results->depthPerComponent = info.GetBitsPerComponent();
   results->isMonochrome = (results->depthPerComponent == 0);
 }
 
 } // namespace content