Remove Widget::OnRootViewLayout().

ui/views/widget/desktop_aura/desktop_native_widget_aura.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_native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
@@ skipping 916 matching lines @@
       wm_transition = wm::ANIMATE_NONE;
       break;
   }
   wm::SetWindowVisibilityAnimationTransition(content_window_, wm_transition);
 }
 
 ui::NativeTheme* DesktopNativeWidgetAura::GetNativeTheme() const {
   return DesktopWindowTreeHost::GetNativeTheme(content_window_);
 }
 
-void DesktopNativeWidgetAura::OnRootViewLayout() {
-  if (content_window_)
-    desktop_window_tree_host_->OnRootViewLayout();
-}
-
 bool DesktopNativeWidgetAura::IsTranslucentWindowOpacitySupported() const {
   return content_window_ &&
       desktop_window_tree_host_->IsTranslucentWindowOpacitySupported();
 }
 
 void DesktopNativeWidgetAura::OnSizeConstraintsChanged() {
   content_window_->SetProperty(aura::client::kCanMaximizeKey,
                                GetWidget()->widget_delegate()->CanMaximize());
   content_window_->SetProperty(aura::client::kCanMinimizeKey,
                                GetWidget()->widget_delegate()->CanMinimize());
@@ skipping 239 matching lines @@
   if (cursor_reference_count_ == 0) {
     // We are the last DesktopNativeWidgetAura instance, and we are responsible
     // for cleaning up |cursor_manager_|.
     delete cursor_manager_;
     native_cursor_manager_ = NULL;
     cursor_manager_ = NULL;
   }
 }
 
 }  // namespace views