[Offline Pages] Add a GCMAppHandler for offline page prefetch.

chrome/browser/android/offline_pages/prefetch/suggested_articles_observer.h

 // Copyright 2017 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 COMPONENTS_OFFLINE_PAGES_CONTENT_SUGGESTED_ARTICLES_OBSERVER_H_
-#define COMPONENTS_OFFLINE_PAGES_CONTENT_SUGGESTED_ARTICLES_OBSERVER_H_
+#ifndef CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PREFETCH_SUGGESTED_ARTICLES_OBSERVER_H_
+#define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PREFETCH_SUGGESTED_ARTICLES_OBSERVER_H_
 
 #include <memory>
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "components/ntp_snippets/content_suggestions_service.h"
 #include "components/offline_pages/core/prefetch/prefetch_service.h"
 
 namespace content {
 class BrowserContext;
@@ skipping 53 matching lines @@
   content::BrowserContext* browser_context_;
   ntp_snippets::CategoryStatus category_status_ =
       ntp_snippets::CategoryStatus::INITIALIZING;
   std::unique_ptr<Delegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(SuggestedArticlesObserver);
 };
 
 }  // namespace offline_pages
 
-#endif  // COMPONENTS_OFFLINE_PAGES_CONTENT_SUGGESTED_ARTICLES_OBSERVER_H_
+#endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PREFETCH_SUGGESTED_ARTICLES_OBSERVER_H_