Extract content dependency from keyboard code

ash/test/test_keyboard_ui.h

+// 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.
+
+#ifndef ASH_TEST_TEST_KEYBOARD_UI_H_
+#define ASH_TEST_TEST_KEYBOARD_UI_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "ui/aura/test/test_window_delegate.h"
+#include "ui/keyboard/keyboard_ui.h"
+
+namespace aura {
+class Window;
+}  // namespace aura
+
+namespace ash {
+
+// Stub implementation of keyboard::KeyboardUI
+class TestKeyboardUI : public keyboard::KeyboardUI {
+ public:
+  TestKeyboardUI();
+  ~TestKeyboardUI() override;
+
+  bool HasKeyboardWindow() const override;
+  aura::Window* GetKeyboardWindow() override;
+
+ private:
+  // Overridden from keyboard::KeyboardUI:
+  ui::InputMethod* GetInputMethod() override;
+  void SetUpdateInputType(ui::TextInputType type) override;
+  void ReloadKeyboardIfNeeded() override;
+  void InitInsets(const gfx::Rect& keyboard_bounds) override;
+  void ResetInsets() override;
+
+  aura::test::TestWindowDelegate delegate_;
+  scoped_ptr<aura::Window> keyboard_;
+  DISALLOW_COPY_AND_ASSIGN(TestKeyboardUI);
+};
+
+}  // namespace ash
+
+#endif  // ASH_TEST_TEST_KEYBOARD_UI_H_