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

chrome/browser/offline_pages/prefetch/prefetch_service_factory.h

Index: chrome/browser/offline_pages/prefetch/prefetch_service_factory.h
diff --git a/components/offline_pages/content/prefetch_service_factory.h b/chrome/browser/offline_pages/prefetch/prefetch_service_factory.h
similarity index 80%
rename from components/offline_pages/content/prefetch_service_factory.h
rename to chrome/browser/offline_pages/prefetch/prefetch_service_factory.h
index c7f4fb16696cc9fc71368d0547c385f894e01bcc..ea620ccbb1d573302820baa764d2813cc9ca4f91 100644
--- a/components/offline_pages/content/prefetch_service_factory.h
+++ b/chrome/browser/offline_pages/prefetch/prefetch_service_factory.h
@@ -2,8 +2,8 @@
 // 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_PREFETCH_SERVICE_FACTORY_H_
-#define COMPONENTS_OFFLINE_PAGES_CONTENT_PREFETCH_SERVICE_FACTORY_H_
+#ifndef CHROME_BROWSER_OFFLINE_PAGES_PREFETCH_PREFETCH_SERVICE_FACTORY_H_
+#define CHROME_BROWSER_OFFLINE_PAGES_PREFETCH_PREFETCH_SERVICE_FACTORY_H_
 
 #include "base/macros.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
@@ -26,6 +26,8 @@ class PrefetchServiceFactory : public BrowserContextKeyedServiceFactory {
   static PrefetchService* GetForBrowserContext(
       content::BrowserContext* context);
 
+  bool ServiceIsCreatedWithBrowserContext() const override;
+
  private:
   friend struct base::DefaultSingletonTraits<PrefetchServiceFactory>;
 
@@ -40,4 +42,4 @@ class PrefetchServiceFactory : public BrowserContextKeyedServiceFactory {
 
 }  // namespace offline_pages
 
-#endif  // COMPONENTS_OFFLINE_PAGES_CONTENT_PREFETCH_SERVICE_FACTORY_H_
+#endif  // CHROME_BROWSER_OFFLINE_PAGES_PREFETCH_PREFETCH_SERVICE_FACTORY_H_