[Offline pages] Removing bookmarks dependency from offline pages component

components/offline_pages/offline_page_model.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 COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_H_
 #define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 15 matching lines @@
 
 class GURL;
 namespace base {
 class SequencedTaskRunner;
 class Time;
 class TimeDelta;
 }
 
 namespace offline_pages {
 
-static const char* const BOOKMARK_NAMESPACE = "bookmark";
-static const int64_t INVALID_OFFLINE_ID = 0;
+static const char* const kBookmarkNamespace = "bookmark";
+static const int64_t kInvalidOfflineId = 0;
 
 struct ClientId;
 
 struct OfflinePageItem;
 class OfflinePageMetadataStore;
 
 // Service for saving pages offline, storing the offline copy and metadata, and
 // retrieving them upon request.
 //
 // Example usage:
@@ skipping 315 matching lines @@
   std::vector<base::Closure> delayed_tasks_;
 
   base::WeakPtrFactory<OfflinePageModel> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OfflinePageModel);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_H_