[Offline pages] Detecting missing offline copy

chrome/browser/android/offline_pages/offline_page_bridge.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 CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_BRIDGE_H_
 #define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_BRIDGE_H_
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_weak_ref.h"
 #include "components/offline_pages/offline_page_model.h"
@@ skipping 18 matching lines @@
   // Returns true if |url| might points to an offline page.
   static bool MightBeOfflineURL(const GURL& url);
 
   OfflinePageBridge(JNIEnv* env,
                     jobject obj,
                     content::BrowserContext* browser_context);
   void Destroy(JNIEnv*, jobject);
 
   // OfflinePageModel::Observer implementation.
   void OfflinePageModelLoaded(OfflinePageModel* model) override;
+  void OfflinePageDeleted(int64 bookmark_id) override;
 
   void GetAllPages(JNIEnv* env,
                    jobject obj,
                    jobject j_result_obj);
   void GetPagesToCleanUp(JNIEnv* env, jobject obj, jobject j_result_obj);
 
   base::android::ScopedJavaLocalRef<jobject>
   GetPageByBookmarkId(JNIEnv* env, jobject obj, jlong bookmark_id);
 
   void SavePage(JNIEnv* env,
                 jobject obj,
                 jobject j_callback_obj,
                 jobject j_web_contents,
                 jlong bookmark_id);
 
   void MarkPageAccessed(JNIEnv* env,
                         jobject obj,
                         jlong bookmark_id);
 
   void DeletePage(JNIEnv* env,
                   jobject obj,
                   jobject j_callback_obj,
                   jlong bookmark_id);
 
   void DeletePages(JNIEnv* env,
                    jobject obj,
                    jobject j_callback_obj,
                    jlongArray bookmark_ids_array);
 
+  void CheckMetadataConsistency(JNIEnv* env, jobject obj);
+
  private:
   void NotifyIfDoneLoading() const;
   static base::FilePath GetDownloadsPath(
       content::BrowserContext* browser_context);
 
   JavaObjectWeakGlobalRef weak_java_ref_;
   // Not owned.
   OfflinePageModel* offline_page_model_;
   // Not owned.
   content::BrowserContext* browser_context_;
   DISALLOW_COPY_AND_ASSIGN(OfflinePageBridge);
 };
 
 bool RegisterOfflinePageBridge(JNIEnv* env);
 
 }  // namespace android
 }  // namespace offline_pages
 
 #endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_BRIDGE_H_