Add UIControlsAsh that works with multiple root windows

ash/shell.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 "ash/shell.h"
 
 #include <algorithm>
 #include <string>
 
 #include "ash/accelerators/focus_manager_factory.h"
@@ skipping 546 matching lines @@
       delegate_(delegate),
 #if defined(OS_CHROMEOS)
       output_configurator_(new chromeos::OutputConfigurator()),
 #endif  // defined(OS_CHROMEOS)
       shelf_(NULL),
       panel_layout_manager_(NULL),
       root_window_layout_(NULL),
       status_area_widget_(NULL),
       browser_context_(NULL) {
   gfx::Screen::SetInstance(screen_);
-  ui_controls::InstallUIControlsAura(CreateUIControlsAura(root_window_.get()));
+  ui_controls::InstallUIControlsAura(internal::CreateUIControls());
 #if defined(OS_CHROMEOS)
   // OutputConfigurator needs to get events regarding added/removed outputs.
   static_cast<aura::DispatcherLinux*>(
       aura::Env::GetInstance()->GetDispatcher())->AddDispatcherForRootWindow(
           output_configurator());
 #endif  // defined(OS_CHROMEOS)
 }
 
 Shell::~Shell() {
   views::FocusManagerFactory::Install(NULL);
@@ skipping 495 matching lines @@
 void Shell::SetCursor(gfx::NativeCursor cursor) {
   // TODO(oshima): set cursor to all root windows.
   GetPrimaryRootWindow()->SetCursor(cursor);
 }
 
 void Shell::ShowCursor(bool visible) {
   GetPrimaryRootWindow()->ShowCursor(visible);
 }
 
 }  // namespace ash