Rename StackingClient -> WindowTreeClient

ash/wm/stacking_controller.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/stacking_controller.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
@@ skipping 49 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 // StackingController, public:
 
 StackingController::StackingController() {
 }
 
 StackingController::~StackingController() {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// StackingController, aura::StackingClient implementation:
+// StackingController, aura::client::WindowTreeClient implementation:
 
 aura::Window* StackingController::GetDefaultParent(aura::Window* context,
                                                    aura::Window* window,
                                                    const gfx::Rect& bounds) {
   aura::RootWindow* target_root = NULL;
   if (window->transient_parent()) {
     // Transient window should use the same root as its transient parent.
     target_root = window->transient_parent()->GetRootWindow();
   } else {
     target_root = FindContainerRoot(bounds);
@@ skipping 59 matching lines @@
         root, internal::kShellWindowId_SystemModalContainer);
   } else {
     container = GetContainerById(
         root, internal::kShellWindowId_LockSystemModalContainer);
   }
 
   return container;
 }
 
 }  // namespace ash