Revert 255617, due to it not tracking use of the link doctor page properly.

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 <stdint.h>
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 407 matching lines @@
 // Tells the frame it is displaying an interstitial page.
 IPC_MESSAGE_ROUTED0(ChromeViewMsg_SetAsInterstitial)
 
 // Provides the renderer with the results of the browser's investigation into
 // 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 */)
 
-// Provides the information needed by the renderer process to contact a
-// navigation correction service.  Handled by the NetErrorHelper.
-IPC_MESSAGE_ROUTED5(ChromeViewMsg_SetNavigationCorrectionInfo,
-                    GURL /* Navigation correction service base URL */,
-                    std::string /* language */,
-                    std::string /* origin_country */,
-                    std::string /* API key to use */,
-                    GURL /* Google Search URL to use */)
+// Sets the alternate error page URL (Link Doctor) for the renderer process.
+// Handled by the NetErrorHelper.
+IPC_MESSAGE_ROUTED1(ChromeViewMsg_SetAltErrorPageURL, GURL)
 
 //-----------------------------------------------------------------------------
 // Misc messages
 // These are messages sent from the renderer to the browser process.
 
 // 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 */)
 
@@ skipping 325 matching lines @@
                             bool /* enabled */)
 
 #if defined(CLD2_DYNAMIC_MODE)
 // Informs the browser process that Compact Language Detector (CLD) data is
 // required by the originating renderer. The browser process should respond
 // with a ChromeViewMsg_CLDDataAvailable if the data is available, else it
 // should go unanswered (the renderer will ask again later).
 // See also: ChromeViewMsg_CLDDataAvailable
 IPC_MESSAGE_ROUTED0(ChromeViewHostMsg_NeedCLDData)
 #endif