ash: Clean up system background layer.

ui/views/widget/desktop_root_window_host_linux.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 UI_VIEWS_WIDGET_DESKTOP_ROOT_WINDOW_HOST_LINUX_H_
 #define UI_VIEWS_WIDGET_DESKTOP_ROOT_WINDOW_HOST_LINUX_H_
 
 #include <X11/Xlib.h>
 
 // Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class.
@@ skipping 143 matching lines @@
   virtual void SetBounds(const gfx::Rect& bounds) OVERRIDE;
   virtual gfx::Point GetLocationOnNativeScreen() const OVERRIDE;
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
   virtual void SetCursor(gfx::NativeCursor cursor) OVERRIDE;
   virtual bool QueryMouseLocation(gfx::Point* location_return) OVERRIDE;
   virtual bool ConfineCursorToRootWindow() OVERRIDE;
   virtual void UnConfineCursor() OVERRIDE;
   virtual void MoveCursorTo(const gfx::Point& location) OVERRIDE;
   virtual void SetFocusWhenShown(bool focus_when_shown) OVERRIDE;
+  virtual bool CopyAreaToSkCanvas(const gfx::Rect& source_bounds,
+                                  const gfx::Point& dest_offset,
+                                  SkCanvas* canvas) OVERRIDE;
   virtual bool GrabSnapshot(
       const gfx::Rect& snapshot_bounds,
       std::vector<unsigned char>* png_representation) OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& native_event) OVERRIDE;
   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
   virtual void PrepareForShutdown() OVERRIDE;
 
   // Overridden from aura::CursorClient:
   // Note: other methods are just set on aura::RootWindowHost:
   virtual void ShowCursor(bool show) OVERRIDE;
@@ skipping 76 matching lines @@
   // can notify widgets when they have lost capture, which controls a bunch of
   // things in views like hiding menus.
   static DesktopRootWindowHostLinux* g_current_capture;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopRootWindowHostLinux);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_ROOT_WINDOW_HOST_LINUX_H_