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

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 "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_target_base.h"
@@ skipping 349 matching lines @@
 
 namespace {
 
 // How many microseconds apart input events should be flushed.
 const int kFlushInputRateInUs = 16666;
 
 }
 
 RenderWidgetHostViewBase::RenderWidgetHostViewBase()
     : popup_type_(blink::WebPopupTypeNone),
+      background_opaque_(true),
       mouse_locked_(false),
       showing_context_menu_(false),
       selection_text_offset_(0),
       selection_range_(gfx::Range::InvalidRange()),
       current_device_scale_factor_(0),
       pinch_zoom_enabled_(content::IsPinchToZoomEnabled()),
       renderer_frame_number_(0) {
 }
 
 RenderWidgetHostViewBase::~RenderWidgetHostViewBase() {
   DCHECK(!mouse_locked_);
 }
 
 bool RenderWidgetHostViewBase::OnMessageReceived(const IPC::Message& msg){
   return false;
 }
 
-void RenderWidgetHostViewBase::SetBackground(const SkBitmap& background) {
-  background_ = background;
+void RenderWidgetHostViewBase::SetBackgroundOpaque(bool opaque) {
+  background_opaque_ = opaque;
 }
 
-const SkBitmap& RenderWidgetHostViewBase::GetBackground() {
-  return background_;
+const bool RenderWidgetHostViewBase::GetBackgroundOpaque() {
+  return background_opaque_;
 }
 
 gfx::Size RenderWidgetHostViewBase::GetPhysicalBackingSize() const {
   gfx::NativeView view = GetNativeView();
   gfx::Display display =
       gfx::Screen::GetScreenFor(view)->GetDisplayNearestWindow(view);
   return gfx::ToCeiledSize(gfx::ScaleSize(GetViewBounds().size(),
                                           display.device_scale_factor()));
 }
 
@@ skipping 185 matching lines @@
 
 gfx::Size RenderWidgetHostViewBase::GetVisibleViewportSize() const {
   return GetViewBounds().size();
 }
 
 void RenderWidgetHostViewBase::SetInsets(const gfx::Insets& insets) {
   NOTIMPLEMENTED();
 }
 
 }  // namespace content