Propagate view background color when changing visible web contents.

content/browser/renderer_host/render_widget_host_view_base.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_base.h"
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
@@ skipping 76 matching lines @@
 }
 
 bool RenderWidgetHostViewBase::OnMessageReceived(const IPC::Message& msg){
   return false;
 }
 
 void RenderWidgetHostViewBase::SetBackgroundColor(SkColor color) {
   background_color_ = color;
 }
 
+SkColor RenderWidgetHostViewBase::background_color() {
+  return background_color_;
+}
+
 void RenderWidgetHostViewBase::SetBackgroundColorToDefault() {
   SetBackgroundColor(SK_ColorWHITE);
 }
 
 bool RenderWidgetHostViewBase::GetBackgroundOpaque() {
   return SkColorGetA(background_color_) == SK_AlphaOPAQUE;
 }
 
 gfx::Size RenderWidgetHostViewBase::GetPhysicalBackingSize() const {
   display::Display display =
@@ skipping 415 matching lines @@
 
 bool RenderWidgetHostViewBase::IsChildFrameForTesting() const {
   return false;
 }
 
 cc::SurfaceId RenderWidgetHostViewBase::SurfaceIdForTesting() const {
   return cc::SurfaceId();
 }
 
 }  // namespace content