[Offline pages] Adding capability to free up space used by Offline pages

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"
 
 namespace base {
 class FilePath;
 }
 
 namespace content {
 class BrowserContext;
 }
 
 namespace offline_pages {
 namespace android {
 
 /**
  * Bridge between C++ and Java for exposing native implementation of offline
  * pages model in managed code.
  */
 class OfflinePageBridge : public OfflinePageModel::Observer {
  public:
+  // 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 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 DeletePage(JNIEnv* env,
                   jobject obj,
                   jobject j_callback_obj,
                   jlong bookmark_id);
 
-  // Returns true if |url| might points to an offline page.
-  static bool MightBeOfflineURL(const GURL& url);
+  void DeletePages(JNIEnv* env,
+                   jobject obj,
+                   jobject j_callback_obj,
+                   jlongArray bookmark_ids_array);
 
  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_