bookmarks: Get rid of the dependency on history_notifications.h

chrome/browser/history/history_backend.h

Index: chrome/browser/history/history_backend.h
diff --git a/chrome/browser/history/history_backend.h b/chrome/browser/history/history_backend.h
index ff759049ce1def1f343e778a8200d37ea88309bc..e0d828b528b01364c5deda85d758a8a8ec1e59e5 100644
--- a/chrome/browser/history/history_backend.h
+++ b/chrome/browser/history/history_backend.h
@@ -31,6 +31,10 @@ class TestingProfile;
 class TypedUrlSyncableService;
 struct ThumbnailScore;
 
+namespace chrome {
+struct FaviconChangedDetails;
+}
+
 namespace history {
 #if defined(OS_ANDROID)
 class AndroidProviderBackend;
@@ -87,6 +91,11 @@ class HistoryBackend : public base::RefCountedThreadSafe<HistoryBackend>,
     virtual void SetInMemoryBackend(int backend_id,
                                     InMemoryHistoryBackend* backend) = 0;
 
+    // Sends chrome::NOTIFICATION_FAVICON_CHANGED through Notification Serivce.
+    // Ownership of the [details] is transferred to this function.
+    virtual void SendFaviconChangedNotification(
+        chrome::FaviconChangedDetails* details) = 0;
+
     // Broadcasts the specified notification to the notification service.
     // This is implemented here because notifications must only be sent from
     // the main thread. This is the only method that doesn't identify the
@@ -783,6 +792,10 @@ class HistoryBackend : public base::RefCountedThreadSafe<HistoryBackend>,
   // Release all tasks in history_db_tasks_ and clears it.
   void ReleaseDBTasks();
 
+  // Sends a chrome::NOTIFICATION_FAVICON_CHANGED notification on the main
+  // thread.
+  void SendFaviconChangedNotification(chrome::FaviconChangedDetails* details);
+
   // Schedules a broadcast of the given notification on the main thread. The
   // details argument will have ownership taken by this function (it will be
   // sent to the main thread and deleted there).