Implement overscroll support for the virtual keyboard.

ash/root_window_controller.cc

 // Copyright (c) 2012 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.
 
 #include "ash/root_window_controller.h"
 
 #include <queue>
 #include <vector>
 
 #include "ash/ash_constants.h"
@@ skipping 594 matching lines @@
 }
 
 void RootWindowController::ActivateKeyboard(
     keyboard::KeyboardController* keyboard_controller) {
   if (!keyboard::IsKeyboardEnabled() ||
       GetContainer(kShellWindowId_VirtualKeyboardContainer)) {
     return;
   }
   DCHECK(keyboard_controller);
   if (!keyboard::IsKeyboardUsabilityExperimentEnabled()) {
+    aura::client::SetVirtualKeyboardClient(root_window(), keyboard_controller);
     keyboard_controller->AddObserver(shelf()->shelf_layout_manager());
     keyboard_controller->AddObserver(panel_layout_manager_);
     keyboard_controller->AddObserver(docked_layout_manager_);
   }
   aura::Window* parent = GetContainer(
       kShellWindowId_VirtualKeyboardParentContainer);
   DCHECK(parent);
   aura::Window* keyboard_container =
       keyboard_controller->GetContainerWindow();
   keyboard_container->set_id(kShellWindowId_VirtualKeyboardContainer);
@@ skipping 13 matching lines @@
       keyboard_controller->GetContainerWindow();
   if (keyboard_container->GetRootWindow() == root_window()) {
     aura::Window* parent = GetContainer(
         kShellWindowId_VirtualKeyboardParentContainer);
     DCHECK(parent);
     parent->RemoveChild(keyboard_container);
     if (!keyboard::IsKeyboardUsabilityExperimentEnabled()) {
       // Virtual keyboard may be deactivated while still showing, notify all
       // observers that keyboard bounds changed to 0 before remove them.
       keyboard_controller->NotifyKeyboardBoundsChanging(gfx::Rect());
+      aura::client::SetVirtualKeyboardClient(root_window(), NULL);
       keyboard_controller->RemoveObserver(shelf()->shelf_layout_manager());
       keyboard_controller->RemoveObserver(panel_layout_manager_);
       keyboard_controller->RemoveObserver(docked_layout_manager_);
     }
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // RootWindowController, private:
 
@@ skipping 347 matching lines @@
     DisableTouchHudProjection();
 }
 
 RootWindowController* GetRootWindowController(
     const aura::Window* root_window) {
   return root_window ? GetRootWindowSettings(root_window)->controller : NULL;
 }
 
 }  // namespace internal
 }  // namespace ash