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

ash/root_window_controller.cc

Index: ash/root_window_controller.cc
diff --git a/ash/root_window_controller.cc b/ash/root_window_controller.cc
index 6477b14bc506782192127d78d36e56b9835d86dc..3690dfeaa364af590f74a4821eb7529eb36771f1 100644
--- a/ash/root_window_controller.cc
+++ b/ash/root_window_controller.cc
@@ -721,13 +721,14 @@ void RootWindowController::Init(RootWindowType root_window_type,
       shell->InitKeyboard();
   } else {
     root_window_layout()->OnWindowResized();
-    shell->desktop_background_controller()->OnRootWindowAdded(root_window);
-    shell->high_contrast_controller()->OnRootWindowAdded(root_window);
     ash_host_->AsWindowTreeHost()->Show();
 
     // Create a shelf if a user is already logged in.
     if (shell->session_state_delegate()->NumberOfLoggedInUsers())
       shelf()->CreateShelf();
+
+    // Notify shell observers about new root window.
+    shell->OnRootWindowAdded(root_window);
   }
 }