Rename GetRootWindow() -> GetPrimaryRootWindow()

ash/wm/window_util.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/wm/window_util.h"
 
 #include "ash/shell.h"
 #include "ash/wm/activation_controller.h"
 #include "ash/wm/window_properties.h"
 #include "ui/aura/client/activation_client.h"
@@ skipping 24 matching lines @@
 bool IsActiveWindow(aura::Window* window) {
   DCHECK(window);
   if (!window->GetRootWindow())
     return false;
   aura::client::ActivationClient* client =
       aura::client::GetActivationClient(window->GetRootWindow());
   return client && client->GetActiveWindow() == window;
 }
 
 aura::Window* GetActiveWindow() {
-  return aura::client::GetActivationClient(Shell::GetRootWindow())->
+  return aura::client::GetActivationClient(Shell::GetPrimaryRootWindow())->
       GetActiveWindow();
 }
 
 aura::Window* GetActivatableWindow(aura::Window* window) {
   return internal::ActivationController::GetActivatableWindow(window, NULL);
 }
 
 bool CanActivateWindow(aura::Window* window) {
   DCHECK(window);
   if (!window->GetRootWindow())
@@ skipping 38 matching lines @@
 }
 
 void CenterWindow(aura::Window* window) {
   const gfx::Monitor monitor = gfx::Screen::GetMonitorNearestWindow(window);
   gfx::Rect center = monitor.work_area().Center(window->bounds().size());
   window->SetBounds(center);
 }
 
 }  // namespace wm
 }  // namespace ash