Block keyboard and mouse input when maximize mode is activated by accelerometer.

ash/desktop_background/desktop_background_controller.h

Index: ash/desktop_background/desktop_background_controller.h
diff --git a/ash/desktop_background/desktop_background_controller.h b/ash/desktop_background/desktop_background_controller.h
index 505f7441792b86584a009f06becf2453195119f0..dbe19399c105e0030adc8b54feca54c79dc1974a 100644
--- a/ash/desktop_background/desktop_background_controller.h
+++ b/ash/desktop_background/desktop_background_controller.h
@@ -7,6 +7,7 @@
 
 #include "ash/ash_export.h"
 #include "ash/display/display_controller.h"
+#include "ash/shell_observer.h"
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
 #include "base/gtest_prod_util.h"
@@ -69,7 +70,8 @@ class WallpaperResizer;
 // Loads selected desktop wallpaper from file system asynchronously and updates
 // background layer if loaded successfully.
 class ASH_EXPORT DesktopBackgroundController
-    : public DisplayController::Observer {
+    : public DisplayController::Observer,
+      public ShellObserver {
  public:
   enum BackgroundMode {
     BACKGROUND_NONE,
@@ -97,9 +99,6 @@ class ASH_EXPORT DesktopBackgroundController
 
   WallpaperLayout GetWallpaperLayout() const;
 
-  // Initialize root window's background.
-  void OnRootWindowAdded(aura::Window* root_window);
-
   // Loads builtin wallpaper asynchronously and sets to current wallpaper
   // after loaded. Returns true if the controller started loading the
   // wallpaper and false otherwise (i.e. the appropriate wallpaper was
@@ -132,9 +131,12 @@ class ASH_EXPORT DesktopBackgroundController
   // Returns true if the desktop moved.
   bool MoveDesktopToUnlockedContainer();
 
-  // Overrides DisplayController::Observer:
+  // DisplayController::Observer:
   virtual void OnDisplayConfigurationChanged() OVERRIDE;
 
+  // ShellObserver:
+  virtual void OnRootWindowAdded(aura::Window* root_window) OVERRIDE;
+
  private:
   friend class DesktopBackgroundControllerTest;
   FRIEND_TEST_ALL_PREFIXES(DesktopBackgroundControllerTest, GetMaxDisplaySize);