Fix size and position of the virtual keyboard after a screen rotation.

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"
+
+namespace ash {
+
+////////////////////////////////////////////////////////////////////////////////
+// VirtualKeyboardContainerLayoutManager, public:
+
+VirtualKeyboardContainerLayoutManager::VirtualKeyboardContainerLayoutManager(
+    aura::Window* container)
+    : SnapToPixelLayoutManager(container),
+      parent_container_(container) {}
+
+VirtualKeyboardContainerLayoutManager::~VirtualKeyboardContainerLayoutManager()
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// 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
+  // update when its parent is resized.

[James Cook, 2014/09/29 21:38:00]

nit: updated

+  aura::Window* keyboard_container =
+      keyboard_controller->GetContainerWindow();
+  if (keyboard_container)
+    keyboard_container->SetBounds(parent_container_->bounds());
+}
+
+}  // namespace ash