[Offline Pages] Delete associated page along with bookmark.

components/offline_pages/offline_page_model.h

Index: components/offline_pages/offline_page_model.h
diff --git a/components/offline_pages/offline_page_model.h b/components/offline_pages/offline_page_model.h
index 9c6efb7aaca737e960f67ac1ce10672776b32f3a..002284eca955289859821c67a6773c276cc57451 100644
--- a/components/offline_pages/offline_page_model.h
+++ b/components/offline_pages/offline_page_model.h
@@ -23,6 +23,10 @@ namespace base {
 class Time;
 }  // namespace base
 
+namespace bookmarks {
+class BookmarkNode;
+}  // namespace bookmarks
+
 namespace offline_pages {
 
 struct ClientId;
@@ -193,6 +197,10 @@ class OfflinePageModel : public base::SupportsUserData {
                            const base::Time& expiration_time,
                            const base::Callback<void(bool)>& callback) = 0;
 
+  // Expire the offline page whose associated bookmark was deleted.
+  virtual void ExpireRemovedBookmarkPage(
+      const bookmarks::BookmarkNode* node) = 0;
+
   // Returns the policy controller.
   virtual ClientPolicyController* GetPolicyController() = 0;