When the user navigates to the home page, make sure to set the RLZ string

content/browser/tab_contents/navigation_controller.h

 // Copyright (c) 2011 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.
 
 #ifndef CONTENT_BROWSER_TAB_CONTENTS_NAVIGATION_CONTROLLER_H_
 #define CONTENT_BROWSER_TAB_CONTENTS_NAVIGATION_CONTROLLER_H_
 #pragma once
 
 #include "build/build_config.h"
 
@@ skipping 158 matching lines @@
   // Returns the transient entry if any.  Note that the returned entry is owned
   // by the navigation controller and may be deleted at any time.
   NavigationEntry* GetTransientEntry() const;
 
   // New navigations -----------------------------------------------------------
 
   // Loads the specified URL.
   void LoadURL(const GURL& url, const GURL& referrer,
                PageTransition::Type type);
 
+  // Loads the specified URL, specifying extra http headers to add to the
+  // request.  Extra headers are separated by \n.
+  void LoadURLWithHeaders(const GURL& url,
+                          const GURL& referrer,
+                          PageTransition::Type type,
+                          const std::string& extra_headers);
+
   // Loads the current page if this NavigationController was restored from
   // history and the current page has not loaded yet.
   void LoadIfNecessary();
 
   // Renavigation --------------------------------------------------------------
 
   // Navigation relative to the "current entry"
   bool CanGoBack() const;
   bool CanGoForward() const;
   void GoBack();
@@ skipping 131 matching lines @@
 
   // Cancels a repost that brought up a warning.
   void CancelPendingReload();
   // Continues a repost that brought up a warning.
   void ContinuePendingReload();
 
   // Returns true if we are navigating to the URL the tab is opened with.
   bool IsInitialNavigation();
 
   // Creates navigation entry and translates the virtual url to a real one.
-  // Used when navigating to a new URL using LoadURL.
+  // Used when navigating to a new URL using LoadURL.  Extra headers are
+  // separated by \n.
   static NavigationEntry* CreateNavigationEntry(
       const GURL& url,
       const GURL& referrer,
       PageTransition::Type transition,
+      const std::string& extra_headers,
       content::BrowserContext* browser_context);
 
  private:
   class RestoreHelper;
   friend class RestoreHelper;
   friend class TabContents;  // For invoking OnReservedPageIDRange.
 
   // Classifies the given renderer navigation (see the NavigationType enum).
   NavigationType::Type ClassifyNavigation(
       const ViewHostMsg_FrameNavigate_Params& params) const;
@@ skipping 134 matching lines @@
   static size_t max_entry_count_;
 
   // If a repost is pending, its type (RELOAD or RELOAD_IGNORING_CACHE),
   // NO_RELOAD otherwise.
   ReloadType pending_reload_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationController);
 };
 
 #endif  // CONTENT_BROWSER_TAB_CONTENTS_NAVIGATION_CONTROLLER_H_