Let Chrome app handle Ash accelerators first if the app is launched as a window

ui/views/focus/focus_manager.h

Index: ui/views/focus/focus_manager.h
diff --git a/ui/views/focus/focus_manager.h b/ui/views/focus/focus_manager.h
index d8c60a68c189dd5f86798bf978a230890f359394..cf6cb86798f80d19eaf6bbfba5f09504ec3dc1c7 100644
--- a/ui/views/focus/focus_manager.h
+++ b/ui/views/focus/focus_manager.h
@@ -80,6 +80,7 @@ class AcceleratorManager;
 
 namespace views {
 
+class FocusManagerDelegate;
 class FocusSearch;
 class RootView;
 class View;
@@ -136,7 +137,7 @@ class VIEWS_EXPORT FocusManager {
     kReasonDirectFocusChange
   };
 
-  explicit FocusManager(Widget* widget);
+  FocusManager(Widget* widget, FocusManagerDelegate* delegate);
   virtual ~FocusManager();
 
   // Processes the passed key event for accelerators and tab traversal.
@@ -270,6 +271,10 @@ class VIEWS_EXPORT FocusManager {
   // The top-level Widget this FocusManager is associated with.
   Widget* widget_;
 
+  // The object which handles an accelerator when |accelerator_manager_| doesn't
+  // handle it.
+  scoped_ptr<FocusManagerDelegate> delegate_;
+
   // The view that currently is focused.
   View* focused_view_;