Allow focus to be sent between browser window and launcher/status window

ash/shell.h

Index: ash/shell.h
diff --git a/ash/shell.h b/ash/shell.h
index 16add64ab50f47014fc13803f5be4f8f8518fe7a..8283881afaf1fd4f2b0f5449fffdf2312547662c 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -47,6 +47,7 @@ class ActivationController;
 class AcceleratorFilter;
 class AppList;
 class DragDropController;
+class FocusCycler;
 class InputMethodEventFilter;
 class RootWindowLayoutManager;
 class ShadowController;
@@ -73,6 +74,11 @@ class ASH_EXPORT Shell {
     MODE_OVERLAPPING,
   };
 
+  enum Direction {
+    FORWARD,
+    BACKWARD
+  };
+
   // A shell must be explicitly created so that it can call |Init()| with the
   // delegate set. |delegate| can be NULL (if not required for initialization).
   static Shell* CreateInstance(ShellDelegate* delegate);
@@ -115,6 +121,9 @@ class ASH_EXPORT Shell {
   views::NonClientFrameView* CreateDefaultNonClientFrameView(
       views::Widget* widget);
 
+  // Rotate focus through containers that can recieve focus.
+  void RotateFocus(Direction direction);
+
   AcceleratorController* accelerator_controller() {
     return accelerator_controller_.get();
   }
@@ -190,6 +199,7 @@ class ASH_EXPORT Shell {
   scoped_ptr<PowerButtonController> power_button_controller_;
   scoped_ptr<VideoDetector> video_detector_;
   scoped_ptr<WindowCycleController> window_cycle_controller_;
+  scoped_ptr<internal::FocusCycler> focus_cycler_;
 
   // An event filter that pre-handles all key events to send them to an IME.
   scoped_ptr<internal::InputMethodEventFilter> input_method_filter_;