Move the concept of Activation to the Shell.

ui/aura/window_delegate.h

Index: ui/aura/window_delegate.h
===================================================================
--- ui/aura/window_delegate.h	(revision 114022)
+++ ui/aura/window_delegate.h	(working copy)
@@ -55,18 +55,6 @@
   // Returns true of the window can be focused.
   virtual bool CanFocus() = 0;
 
-  // Returns true if the window should be activated. |event| is either the mouse
-  // event supplied if the activation is the result of a mouse, or the touch
-  // event if the activation is the result of a touch, or NULL if activation is
-  // attempted for another reason.
-  virtual bool ShouldActivate(Event* event) = 0;
-
-  // Sent when the window is activated.
-  virtual void OnActivated() = 0;
-
-  // Sent when the window loses active status.
-  virtual void OnLostActive() = 0;
-
   // Invoked when mouse capture is lost on the window.
   virtual void OnCaptureLost() = 0;