[content] Fix background color update handling in RWHVAura.

content/browser/renderer_host/render_widget_host_view_aura.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_AURA_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 94 matching lines @@
   gfx::Vector2dF GetLastScrollOffset() const override;
   gfx::NativeView GetNativeView() const override;
   gfx::NativeViewAccessible GetNativeViewAccessible() override;
   ui::TextInputClient* GetTextInputClient() override;
   bool HasFocus() const override;
   void Show() override;
   void Hide() override;
   bool IsShowing() override;
   gfx::Rect GetViewBounds() const override;
   void SetBackgroundColor(SkColor color) override;
+  SkColor background_color() const override;
   bool IsMouseLocked() override;
   gfx::Size GetVisibleViewportSize() const override;
   void SetInsets(const gfx::Insets& insets) override;
   void FocusedNodeTouched(const gfx::Point& location_dips_screen,
                           bool editable) override;
   void SetNeedsBeginFrames(bool needs_begin_frames) override;
 
   // Overridden from RenderWidgetHostViewBase:
   void InitAsPopup(RenderWidgetHostView* parent_host_view,
                    const gfx::Rect& pos) override;
@@ skipping 331 matching lines @@
   // Used to set the |popup_child_host_view_| on the |popup_parent_host_view_|
   // and to notify the |event_handler_|.
   void SetPopupChild(RenderWidgetHostViewAura* popup_child_host_view);
 
   // Forwards a mouse event to this view's parent window delegate.
   void ForwardMouseEventToParent(ui::MouseEvent* event);
 
   // Tells DelegatedFrameHost whether we need to receive BeginFrames.
   void UpdateNeedsBeginFramesInternal();
 
+  // Applies background color without notifying the RenderWidget about
+  // opaqueness changes.
+  void UpdateBackgroundColorFromRenderer(SkColor color);
+
   // The model object.
   RenderWidgetHostImpl* const host_;
 
   aura::Window* window_;
 
   std::unique_ptr<DelegatedFrameHostClient> delegated_frame_host_client_;
   // NOTE: this may be null.
   std::unique_ptr<DelegatedFrameHost> delegated_frame_host_;
 
   std::unique_ptr<WindowObserver> window_observer_;
@@ skipping 24 matching lines @@
 
   // The cursor for the page. This is passed up from the renderer.
   WebCursor current_cursor_;
 
   // Indicates if there is onging composition text.
   bool has_composition_text_;
 
   // Current tooltip text.
   base::string16 tooltip_;
 
+  // The background color of the web content.
+  SkColor background_color_;
+
   // Whether a request for begin frames has been issued.
   bool needs_begin_frames_;
 
   // Whether a request to flush input has been issued.
   bool needs_flush_input_;
 
   // Whether or not a frame observer has been added.
   bool added_frame_observer_;
 
   // Used to track the last cursor visibility update that was sent to the
@@ skipping 56 matching lines @@
   std::unique_ptr<RenderWidgetHostViewEventHandler> event_handler_;
 
   base::WeakPtrFactory<RenderWidgetHostViewAura> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAura);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_