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

content/browser/renderer_host/render_widget_host_view_base.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 
 #if defined(OS_MACOSX)
 #include <OpenGL/OpenGL.h>
 #endif
@@ skipping 45 matching lines @@
 struct WebPluginGeometry;
 struct NativeWebKeyboardEvent;
 
 // Basic implementation shared by concrete RenderWidgetHostView subclasses.
 class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
                                                 public IPC::Listener {
  public:
   virtual ~RenderWidgetHostViewBase();
 
   // RenderWidgetHostView implementation.
-  virtual void SetBackground(const SkBitmap& background) OVERRIDE;
-  virtual const SkBitmap& GetBackground() OVERRIDE;
+  virtual void SetBackgroundOpaque(bool opaque) OVERRIDE;
+  virtual bool GetBackgroundOpaque() OVERRIDE;
   virtual ui::TextInputClient* GetTextInputClient() OVERRIDE;
   virtual bool IsShowingContextMenu() const OVERRIDE;
   virtual void SetShowingContextMenu(bool showing_menu) OVERRIDE;
   virtual base::string16 GetSelectedText() const OVERRIDE;
   virtual bool IsMouseLocked() OVERRIDE;
   virtual gfx::Size GetVisibleViewportSize() const OVERRIDE;
   virtual void SetInsets(const gfx::Insets& insets) OVERRIDE;
   virtual void BeginFrameSubscription(
       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) OVERRIDE;
   virtual void EndFrameSubscription() OVERRIDE;
@@ skipping 294 matching lines @@
 
   // Needs to be called before the HWND backing the view goes away to avoid
   // crashes in Windowed plugins.
   static void DetachPluginsHelper(HWND parent);
 #endif
 
   // Whether this view is a popup and what kind of popup it is (select,
   // autofill...).
   blink::WebPopupType popup_type_;
 
-  // A custom background to paint behind the web content. This will be tiled
-  // horizontally. Can be null, in which case we fall back to painting white.
-  SkBitmap background_;
+  // When false, the background of the web content is not fully opaque.
+  bool background_opaque_;
 
   // While the mouse is locked, the cursor is hidden from the user. Mouse events
   // are still generated. However, the position they report is the last known
   // mouse position just as mouse lock was entered; the movement they report
   // indicates what the change in position of the mouse would be had it not been
   // locked.
   bool mouse_locked_;
 
   // Whether we are showing a context menu.
   bool showing_context_menu_;
@@ skipping 30 matching lines @@
   uint32 renderer_frame_number_;
 
   base::OneShotTimer<RenderWidgetHostViewBase> flush_input_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewBase);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_