Fix header guard and namespace in android_webview

android_webview/browser/aw_contents_background_thread_client.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 ANDROID_WEBVIEW_BROWSER_AW_CONTENTS_BACKGROUND_THREAD_CLIENT_H_
 #define ANDROID_WEBVIEW_BROWSER_AW_CONTENTS_BACKGROUND_THREAD_CLIENT_H_
 
 #include "base/android/scoped_java_ref.h"
 
 namespace android_webview {
 
 class AwContentsBackgroundThreadClient {
  public:
   static base::android::ScopedJavaLocalRef<jobject> shouldInterceptRequest(
       JNIEnv* env,
       const base::android::JavaRef<jobject>& obj,
       const base::android::JavaRef<jstring>& url,
       jboolean isMainFrame,
       jboolean hasUserGesture,
       const base::android::JavaRef<jstring>& method,
       const base::android::JavaRef<jobjectArray>& requestHeaderNames,
       const base::android::JavaRef<jobjectArray>& requestHeaderValues);
 };
-}
+}  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_AW_CONTENTS_BACKGROUND_THREAD_CLIENT_H_