Rename VisitDatabaseObserver to HistoryServiceObserver

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 0d8046c1529e1a33ad2b88279ed8ff45b8f4f226..819f9df23ac95562c13bf15b6ad70defa82b15b9 100644
--- a/chrome/browser/history/history_backend.h
+++ b/chrome/browser/history/history_backend.h
@@ -120,6 +120,10 @@ class HistoryBackend : public base::RefCountedThreadSafe<HistoryBackend>,
     virtual void SetInMemoryBackend(
         scoped_ptr<InMemoryHistoryBackend> backend) = 0;
 
+    // Notify HistoryService that VisitDatabase was changed. The event will be
+    // forwarded to the history::HistoryServiceObservers in the UI thread.
+    virtual void NotifyAddVisit(const history::BriefVisitInfo& info) = 0;
+
     // Notify HistoryService that some URLs favicon changed that will forward
     // the events to the FaviconChangedObservers in the correct thread.
     virtual void NotifyFaviconChanged(const std::set<GURL>& urls) = 0;
@@ -133,9 +137,6 @@ class HistoryBackend : public base::RefCountedThreadSafe<HistoryBackend>,
 
     // Invoked when the backend has finished loading the db.
     virtual void DBLoaded() = 0;
-
-    virtual void NotifyVisitDBObserversOnAddVisit(
-        const history::BriefVisitInfo& info) = 0;
   };
 
   // Init must be called to complete object creation. This object can be