Remove HistoryPublisher code.

chrome/browser/history/history_tab_helper.h

Index: chrome/browser/history/history_tab_helper.h
diff --git a/chrome/browser/history/history_tab_helper.h b/chrome/browser/history/history_tab_helper.h
index 41f3fd5fb66caaeb7be9722e112310ce38d9eabe..65c21ad3b63d0cb7a70a17caf3733a16b9baa17b 100644
--- a/chrome/browser/history/history_tab_helper.h
+++ b/chrome/browser/history/history_tab_helper.h
@@ -43,7 +43,6 @@ class HistoryTabHelper : public content::WebContentsObserver,
   friend class content::WebContentsUserData<HistoryTabHelper>;
 
   // content::WebContentsObserver implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void DidNavigateMainFrame(
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) OVERRIDE;
@@ -54,8 +53,6 @@ class HistoryTabHelper : public content::WebContentsObserver,
                            bool explicit_set) OVERRIDE;
   virtual void WebContentsDestroyed(content::WebContents* tab) OVERRIDE;
 
-  void OnPageContents(const GURL& url, const string16& contents);
-
   // Helper function to return the history service.  May return NULL.
   HistoryService* GetHistoryService();