[content] Fix background color update handling in RWHVAura.

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 17 matching lines @@
 namespace {
 
 // How many microseconds apart input events should be flushed.
 const int kFlushInputRateInUs = 16666;
 
 }
 
 RenderWidgetHostViewBase::RenderWidgetHostViewBase()
     : is_fullscreen_(false),
       popup_type_(blink::WebPopupTypeNone),
-      background_color_(SK_ColorWHITE),
       mouse_locked_(false),
       showing_context_menu_(false),
       current_device_scale_factor_(0),
       current_display_rotation_(display::Display::ROTATE_0),
       text_input_manager_(nullptr),
       renderer_frame_number_(0),
       weak_factory_(this) {
 }
 
 RenderWidgetHostViewBase::~RenderWidgetHostViewBase() {
@@ skipping 31 matching lines @@
   for (auto& observer : observers_)
     observer.OnRenderWidgetHostViewBaseDestroyed(this);
   // All observers are required to disconnect after they are notified.
   DCHECK(!observers_.might_have_observers());
 }
 
 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 {
   return gfx::ScaleToCeiledSize(
       GetRequestedRendererSize(),
       ui::GetScaleFactorForNativeView(GetNativeView()));
 }
 
 bool RenderWidgetHostViewBase::DoBrowserControlsShrinkBlinkSize() const {
   return false;
 }
 
@@ skipping 398 matching lines @@
 
 bool RenderWidgetHostViewBase::IsChildFrameForTesting() const {
   return false;
 }
 
 cc::SurfaceId RenderWidgetHostViewBase::SurfaceIdForTesting() const {
   return cc::SurfaceId();
 }
 
 }  // namespace content