Extract content dependency from keyboard code

ui/keyboard/keyboard_ui.cc

+// Copyright 2015 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 "ui/keyboard/keyboard_ui.h"
+
+#include "ui/aura/window.h"
+#include "ui/base/ime/input_method.h"
+#include "ui/base/ime/text_input_client.h"
+#include "ui/keyboard/keyboard_controller.h"
+
+namespace keyboard {
+
+KeyboardUI::KeyboardUI()
+    : keyboard_controller_(nullptr) {
+}
+
+KeyboardUI::~KeyboardUI() {
+}
+
+aura::Window* KeyboardUI::GetKeyboardWindow() {
+  return nullptr;
+}
+
+bool KeyboardUI::HasKeyboardWindow() const {
+  return false;
+}
+
+void KeyboardUI::ShowKeyboardContainer(aura::Window* container) {
+  GetKeyboardWindow()->Show();

[sky, 2015/10/09 18:23:29]

Is it assumed that GetKeyboardWindow() always creates?

+  container->Show();
+}
+
+void KeyboardUI::HideKeyboardContainer(aura::Window* container) {
+  container->Hide();
+  GetKeyboardWindow()->Hide();
+}
+
+void KeyboardUI::SetUpdateInputType(ui::TextInputType type) {
+}
+
+void KeyboardUI::EnsureCaretInWorkArea() {
+  if (GetInputMethod()->GetTextInputClient()) {
+    aura::Window* keyboard_window = GetKeyboardWindow();
+    aura::Window* root_window = keyboard_window->GetRootWindow();
+    gfx::Rect available_bounds = root_window->bounds();
+    gfx::Rect keyboard_bounds = keyboard_window->bounds();
+    available_bounds.set_height(available_bounds.height() -
+        keyboard_bounds.height());
+    GetInputMethod()->GetTextInputClient()->EnsureCaretInRect(available_bounds);
+  }
+}
+
+void KeyboardUI::SetController(KeyboardController* controller) {
+  keyboard_controller_ = controller;
+}
+
+void KeyboardUI::ReloadKeyboardIfNeeded() {
+}
+
+void KeyboardUI::InitInsets(const gfx::Rect& new_bounds) {
+}
+
+void KeyboardUI::ResetInsets() {
+}
+
+}  // namespace keyboard