Remove Widget::OnRootViewLayout().

ui/views/widget/desktop_aura/desktop_window_tree_host_win.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_aura/desktop_window_tree_host_win.h"
 
 #include "base/memory/ptr_util.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 448 matching lines @@
 }
 
 void DesktopWindowTreeHostWin::InitModalType(ui::ModalType modal_type) {
   message_handler_->InitModalType(modal_type);
 }
 
 void DesktopWindowTreeHostWin::FlashFrame(bool flash_frame) {
   message_handler_->FlashFrame(flash_frame);
 }
 
-void DesktopWindowTreeHostWin::OnRootViewLayout() {
-}
-
 bool DesktopWindowTreeHostWin::IsAnimatingClosed() const {
   return pending_close_;
 }
 
 bool DesktopWindowTreeHostWin::IsTranslucentWindowOpacitySupported() const {
   return ui::win::IsAeroGlassEnabled();
 }
 
 void DesktopWindowTreeHostWin::SizeConstraintsChanged() {
   message_handler_->SizeConstraintsChanged();
@@ skipping 508 matching lines @@
 
 // static
 DesktopWindowTreeHost* DesktopWindowTreeHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura) {
   return new DesktopWindowTreeHostWin(native_widget_delegate,
                                       desktop_native_widget_aura);
 }
 
 }  // namespace views