ash: Clean up system background layer.

ui/views/widget/desktop_root_window_host_linux.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 "ui/views/widget/desktop_root_window_host_linux.h"
 
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xutil.h>
 
@@ skipping 746 matching lines @@
   static const char* k_NET_WM_USER_TIME = "_NET_WM_USER_TIME";
   focus_when_shown_ = focus_when_shown;
   if (IsWindowManagerPresent() && !focus_when_shown_) {
     ui::SetIntProperty(xwindow_,
                        k_NET_WM_USER_TIME,
                        k_NET_WM_USER_TIME,
                        0);
   }
 }
 
+bool DesktopRootWindowHostLinux::CopyAreaToSkCanvas(
+    const gfx::Rect& source_bounds,
+    const gfx::Point& dest_offset,
+    SkCanvas* canvas) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
 bool DesktopRootWindowHostLinux::GrabSnapshot(
       const gfx::Rect& snapshot_bounds,
       std::vector<unsigned char>* png_representation) {
   NOTIMPLEMENTED();
   return false;
 }
 
 void DesktopRootWindowHostLinux::PostNativeEvent(
     const base::NativeEvent& native_event) {
   DCHECK(xwindow_);
@@ skipping 313 matching lines @@
 DesktopRootWindowHost* DesktopRootWindowHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura,
     const gfx::Rect& initial_bounds) {
   return new DesktopRootWindowHostLinux(native_widget_delegate,
                                         desktop_native_widget_aura,
                                         initial_bounds);
 }
 
 }  // namespace views