Remove some uses of RootWindow in Ash.

Adds a window() accessor to RootWindow. This is redundant now but necessary for when RootWindow is no longer a RootWindow. A subsequent CL will sever that relationship.

[email protected]
http://crbug.com/308843

Review URL: https://codereview.chromium.org/67083004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234082 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/ash/root_window_controller.h b/ash/root_window_controller.h
index fa8172f9..980bf1e 100644
--- a/ash/root_window_controller.h
+++ b/ash/root_window_controller.h
@@ -13,13 +13,13 @@
 #include "ash/system/user/login_status.h"
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
+#include "ui/aura/root_window.h"
 #include "ui/base/ui_base_types.h"
 
 class SkBitmap;
 
 namespace aura {
 class EventFilter;
-class RootWindow;
 class Window;
 }
 
@@ -102,7 +102,8 @@
 
   virtual ~RootWindowController();
 
-  aura::RootWindow* root_window() { return root_window_.get(); }
+  aura::Window* root_window() { return dispatcher()->window(); }
+  aura::WindowEventDispatcher* dispatcher() { return root_window_.get(); }
 
   RootWindowLayoutManager* root_window_layout() { return root_window_layout_; }
 
@@ -245,7 +246,7 @@
 
   // Creates each of the special window containers that holds windows of various
   // types in the shell UI.
-  void CreateContainersInRootWindow(aura::RootWindow* root_window);
+  void CreateContainersInRootWindow(aura::Window* root_window);
 
   // Enables projection touch HUD.
   void EnableTouchHudProjection();