Allow component IME extension use app.window and add 'ime' window type for app window

ash/shell_unittest.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 <vector>
 
 #include "ash/ash_switches.h"
@@ skipping 64 matching lines @@
                                   kShellWindowId_LockSystemModalContainer));
   EXPECT_TRUE(Shell::GetContainer(root_window, kShellWindowId_StatusContainer));
   EXPECT_TRUE(Shell::GetContainer(root_window, kShellWindowId_MenuContainer));
   EXPECT_TRUE(Shell::GetContainer(root_window,
                                   kShellWindowId_DragImageAndTooltipContainer));
   EXPECT_TRUE(
       Shell::GetContainer(root_window, kShellWindowId_SettingBubbleContainer));
   EXPECT_TRUE(
       Shell::GetContainer(root_window, kShellWindowId_OverlayContainer));
   EXPECT_TRUE(Shell::GetContainer(
-      root_window, kShellWindowId_VirtualKeyboardParentContainer));
+      root_window, kShellWindowId_ImeWindowParentContainer));
 #if defined(OS_CHROMEOS)
   EXPECT_TRUE(
       Shell::GetContainer(root_window, kShellWindowId_MouseCursorContainer));
 #endif
 }
 
 class ModalWindow : public views::WidgetDelegateView {
  public:
   ModalWindow() {}
   virtual ~ModalWindow() {}
@@ skipping 437 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(ShellTest2);
 };
 
 TEST_F(ShellTest2, DontCrashWhenWindowDeleted) {
   window_.reset(new aura::Window(NULL));
   window_->Init(aura::WINDOW_LAYER_NOT_DRAWN);
 }
 
 }  // namespace ash