Retires WorkspaceContainer.

Now DefaultContainer holds the normal windows.

BUG=264396
[email protected]
TEST=ash_unittests still passes

Review URL: https://chromiumcodereview.appspot.com/21806009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@215664 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/ash/root_window_controller.h b/ash/root_window_controller.h
index 920c553c..05ab29f 100644
--- a/ash/root_window_controller.h
+++ b/ash/root_window_controller.h
@@ -157,6 +157,7 @@
       aura::Window* window);
 
   aura::Window* GetContainer(int container_id);
+  const aura::Window* GetContainer(int container_id) const;
 
   // Initializes the RootWindowController. |first_run_after_boot| is
   // set to true only for primary root window after boot.
@@ -204,7 +205,7 @@
   // Returns the window, if any, which is in fullscreen mode in the active
   // workspace. Exposed here so clients of Ash don't need to know the details
   // of workspace management.
-  aura::Window* GetFullscreenWindow() const;
+  const aura::Window* GetFullscreenWindow() const;
 
  private:
   void InitLayoutManagers();