[Android] Rename NativeWindow to WindowAndroid.

ui/android/window_android.h

 // 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.
 
-#ifndef UI_GFX_ANDROID_WINDOW_ANDROID_H_
-#define UI_GFX_ANDROID_WINDOW_ANDROID_H_
+#ifndef UI_ANDROID_WINDOW_ANDROID_H_
+#define UI_ANDROID_WINDOW_ANDROID_H_
 
 #include <jni.h>
 #include "base/android/jni_helper.h"
 #include "base/android/scoped_java_ref.h"
 #include "ui/base/ui_export.h"
 
 namespace ui {
 
 // Android implementation of the activity window.
 class UI_EXPORT WindowAndroid {
  public:
   WindowAndroid(JNIEnv* env, jobject obj);
 
   void Destroy(JNIEnv* env, jobject obj);
 
   base::android::ScopedJavaLocalRef<jobject> GetJavaObject();
 
   static bool RegisterWindowAndroid(JNIEnv* env);
 
  private:
   ~WindowAndroid();
 
   JavaObjectWeakGlobalRef weak_java_window_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowAndroid);
 };
 
 }  // namespace ui
 
-#endif  // UI_GFX_ANDROID_WINDOW_ANDROID_H_
+#endif  // UI_ANDROID_WINDOW_ANDROID_H_