Allow javascript change the virtual keyboard window size and position freely in FLOATING mode

ash/wm/virtual_keyboard_container_layout_manager.cc

 // Copyright 2014 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/wm/virtual_keyboard_container_layout_manager.h"
 
 #include "ash/shell_window_ids.h"
 #include "ui/aura/window.h"
 #include "ui/keyboard/keyboard_controller.h"
 
@@ skipping 13 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // VirtualKeyboardContainerLayoutManager, aura::LayoutManager implementation:
 
 void VirtualKeyboardContainerLayoutManager::OnWindowResized() {
   keyboard::KeyboardController* keyboard_controller =
       keyboard::KeyboardController::GetInstance();
   if (!keyboard_controller)
     return;
 
-  // The layout manager for the root window propagates a resize to its
-  // immediate children and grandchildren, but stops there. The keyboard
-  // container is three levels deep, and therefore needs to be explicitly
-  // updated when its parent is resized.
-  aura::Window* keyboard_container =
-      keyboard_controller->GetContainerWindow();
-  if (keyboard_container)
-    keyboard_container->SetBounds(parent_container_->bounds());
+  if (keyboard_controller->keyboard_container_initialized())
+    keyboard_controller->OnRootWindowResized(parent_container_->bounds());
 }
 
 }  // namespace ash