Rename ash desktop_background to wallpaper.

ash/common/shell_window_ids.h

 // 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.
 
 #ifndef ASH_COMMON_SHELL_WINDOW_IDS_H_
 #define ASH_COMMON_SHELL_WINDOW_IDS_H_
 
 #include <stddef.h>
 
 #include "ash/ash_export.h"
@@ skipping 18 matching lines @@
 // A higher-level container that holds containers that hold lock-screen-related
 // windows (which we want to display while the screen is locked; effectively
 // containers stacked above kShellWindowId_LockSystemModalContainer).  Only used
 // by PowerButtonController for animating lower-level containers.
 const int kShellWindowId_LockScreenRelatedContainersContainer = 2;
 
 // A container used for windows of WINDOW_TYPE_CONTROL that have no parent.
 // This container is not visible.
 const int kShellWindowId_UnparentedControlContainer = 3;
 
-// The desktop background window.
-const int kShellWindowId_DesktopBackgroundContainer = 4;
+// The wallpaper (desktop background) window.
+const int kShellWindowId_WallpaperContainer = 4;
 
 // The virtual keyboard container.
 // NOTE: this is lazily created.
 const int kShellWindowId_VirtualKeyboardContainer = 5;
 
 // The container for standard top-level windows.
 const int kShellWindowId_DefaultContainer = 6;
 
 // The container for top-level windows with the 'always-on-top' flag set.
 const int kShellWindowId_AlwaysOnTopContainer = 7;
 
 // The container for windows docked to either side of the desktop.
 const int kShellWindowId_DockedContainer = 8;
 
 // The container for the shelf.
 const int kShellWindowId_ShelfContainer = 9;
 
 // The container for bubbles which float over the shelf.
 const int kShellWindowId_ShelfBubbleContainer = 10;
 
 // The container for panel windows.
 const int kShellWindowId_PanelContainer = 11;
 
 // The container for the app list.
 const int kShellWindowId_AppListContainer = 12;
 
 // The container for user-specific modal windows.
 const int kShellWindowId_SystemModalContainer = 13;
 
-// The container for the lock screen background.
-const int kShellWindowId_LockScreenBackgroundContainer = 14;
+// The container for the lock screen wallpaper (lock screen background).
+const int kShellWindowId_LockScreenWallpaperContainer = 14;
 
 // The container for the lock screen.
 const int kShellWindowId_LockScreenContainer = 15;
 
 // The container for the lock screen modal windows.
 const int kShellWindowId_LockSystemModalContainer = 16;
 
 // The container for the status area.
 const int kShellWindowId_StatusContainer = 17;
 
@@ skipping 32 matching lines @@
 // that need to be activated.
 ASH_EXPORT extern const int kActivatableShellWindowIds[];
 ASH_EXPORT extern const size_t kNumActivatableShellWindowIds;
 
 // Returns true if |id| is in |kActivatableShellWindowIds|.
 ASH_EXPORT bool IsActivatableShellWindowId(int id);
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SHELL_WINDOW_IDS_H_