Overscroll for keyboard disabled while keyboard is hiding.

ui/keyboard/keyboard_controller.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_KEYBOARD_KEYBOARD_CONTROLLER_H_
 #define UI_KEYBOARD_KEYBOARD_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/event_types.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 86 matching lines @@
   bool keyboard_visible() { return keyboard_visible_; }
 
   bool show_on_resize() { return show_on_resize_; }
 
   // Returns the current keyboard bounds. When the keyboard is not shown,
   // an empty rectangle will get returned.
   const gfx::Rect& current_keyboard_bounds() {
     return current_keyboard_bounds_;
   }
 
+  // Determines whether a particular window should have insets for overscroll.
+  bool ShouldEnableInsets(aura::Window* window);
+
   // Updates insets on web content window
   void UpdateWindowInsets(aura::Window* window);
 
  private:
   // For access to Observer methods for simulation.
   friend class KeyboardControllerTest;
 
   // aura::WindowObserver overrides
   virtual void OnWindowHierarchyChanged(
       const HierarchyChangeParams& params) OVERRIDE;
@@ skipping 52 matching lines @@
   gfx::Rect current_keyboard_bounds_;
 
   static KeyboardController* instance_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyboardController);
 };
 
 }  // namespace keyboard
 
 #endif  // UI_KEYBOARD_KEYBOARD_CONTROLLER_H_