Implement overscroll support for the virtual keyboard.

ash/wm/panels/panel_layout_manager.h

Index: ash/wm/panels/panel_layout_manager.h
diff --git a/ash/wm/panels/panel_layout_manager.h b/ash/wm/panels/panel_layout_manager.h
index 150dd3237488beecca21ab7aa5ca2b3cc840a5ae..6fcc527406e08685541c3d5d8b9e33dffcb6e437 100644
--- a/ash/wm/panels/panel_layout_manager.h
+++ b/ash/wm/panels/panel_layout_manager.h
@@ -17,10 +17,10 @@
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "ui/aura/client/virtual_keyboard_observer.h"
 #include "ui/aura/layout_manager.h"
 #include "ui/aura/window_observer.h"
 #include "ui/keyboard/keyboard_controller.h"
-#include "ui/keyboard/keyboard_controller_observer.h"
 #include "ui/wm/public/activation_change_observer.h"
 
 namespace aura {
@@ -58,7 +58,7 @@ class ASH_EXPORT PanelLayoutManager
       public ShellObserver,
       public aura::WindowObserver,
       public aura::client::ActivationChangeObserver,
-      public keyboard::KeyboardControllerObserver,
+      public aura::client::VirtualKeyboardObserver,
       public DisplayController::Observer,
       public ShelfLayoutManagerObserver,
       public wm::WindowStateObserver {
@@ -160,7 +160,7 @@ class ASH_EXPORT PanelLayoutManager
   // Update the callout arrows for all managed panels.
   void UpdateCallouts();
 
-  // Overridden from keyboard::KeyboardControllerObserver:
+  // Overridden from aura::client::VirtualKeyboardObserver:
   virtual void OnKeyboardBoundsChanging(
       const gfx::Rect& keyboard_bounds) OVERRIDE;