Remove HistoryPublisher code.

chrome/common/render_messages.h

 // Copyright (c) 2012 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.
 
 // Multiply-included file, no traditional include guard.
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 420 matching lines @@
 // why a recent main frame load failed (currently, just DNS probe result).
 // NetErrorHelper will receive this mesage and replace or update the error
 // page with more specific troubleshooting suggestions.
 IPC_MESSAGE_ROUTED1(ChromeViewMsg_NetErrorInfo,
                     int /* DNS probe status */)
 
 //-----------------------------------------------------------------------------
 // Misc messages
 // These are messages sent from the renderer to the browser process.
 
-// Provides the contents for the given page that was loaded recently.
-IPC_MESSAGE_ROUTED2(ChromeViewHostMsg_PageContents,
-                    GURL         /* URL of the page */,
-                    string16     /* page contents */)
-
 // Notification that the language for the tab has been determined.
 IPC_MESSAGE_ROUTED2(ChromeViewHostMsg_TranslateLanguageDetermined,
                     LanguageDetectionDetails /* details about lang detection */,
                     bool /* whether the page needs translation */)
 
 IPC_MESSAGE_CONTROL1(ChromeViewHostMsg_UpdatedCacheStats,
                      blink::WebCache::UsageStats /* stats */)
 
 // Tells the browser that content in the current page was blocked due to the
 // user's content settings.
@@ skipping 322 matching lines @@
                      std::vector<GURL> /* search_urls */,
                      GURL /* new_tab_page_url */)
 
 // Tells listeners that a detailed message was reported to the console by
 // WebKit.
 IPC_MESSAGE_ROUTED4(ChromeViewHostMsg_DetailedConsoleMessageAdded,
                     string16 /* message */,
                     string16 /* source */,
                     extensions::StackTrace /* stack trace */,
                     int32 /* severity level */)