Implement overscroll support for the virtual keyboard.

ash/wm/dock/docked_window_layout_manager.h

Index: ash/wm/dock/docked_window_layout_manager.h
diff --git a/ash/wm/dock/docked_window_layout_manager.h b/ash/wm/dock/docked_window_layout_manager.h
index 18569d8f8dbea57994484fdaa85643b34f63b5f6..a2da2e3b5c6b0ba9871902abd3e046bf290c6a5c 100644
--- a/ash/wm/dock/docked_window_layout_manager.h
+++ b/ash/wm/dock/docked_window_layout_manager.h
@@ -18,11 +18,11 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
+#include "ui/aura/client/virtual_keyboard_observer.h"
 #include "ui/aura/layout_manager.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_observer.h"
 #include "ui/gfx/rect.h"
-#include "ui/keyboard/keyboard_controller_observer.h"
 #include "ui/wm/public/activation_change_observer.h"
 
 namespace aura {
@@ -74,7 +74,7 @@ class ASH_EXPORT DockedWindowLayoutManager
       public ash::ShellObserver,
       public aura::WindowObserver,
       public aura::client::ActivationChangeObserver,
-      public keyboard::KeyboardControllerObserver,
+      public aura::client::VirtualKeyboardObserver,
       public ShelfLayoutManagerObserver,
       public wm::WindowStateObserver {
  public:
@@ -248,7 +248,7 @@ class ASH_EXPORT DockedWindowLayoutManager
   // changes or a window is moved).
   void UpdateStacking(aura::Window* active_window);
 
-  // keyboard::KeyboardControllerObserver:
+  // aura::client::VirtualKeyboardObserver:
   virtual void OnKeyboardBoundsChanging(
       const gfx::Rect& keyboard_bounds) OVERRIDE;