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

chrome/browser/rlz/rlz.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 CHROME_BROWSER_RLZ_RLZ_H_
 #define CHROME_BROWSER_RLZ_RLZ_H_
 #pragma once
 
 #include "build/build_config.h"
 
@@ skipping 48 matching lines @@
 
   // This method is public for use by the Singleton class.
   static RLZTracker* GetInstance();
 
   // The following methods are made protected so that they can be used for
   // testing purposes. Production code should never need to call these.
  protected:
   RLZTracker();
   ~RLZTracker();
 
-  // This is a temporary constant used here until the home page change is
-  // committed, which will happen before 2011-09-01. This constant will be
-  // replaced with PageTransition::HOME_PAGE.
-  static const int RLZ_PAGETRANSITION_HOME_PAGE = 0x02000000;
-
   // Thread function entry point, see ScheduleFinancialPing(). Assumes argument
   // is a pointer to an RLZTracker.
   static void _cdecl PingNow(void* tracker);
 
   // Performs initialization of RLZ tracker that is purposefully delayed so
   // that it does not interfere with chrome startup time.
   virtual void DelayedInit();
 
   // NotificationObserver implementation:
   virtual void Observe(int type,
@@ skipping 71 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RLZTracker);
 };
 
 // The RLZTracker is a singleton object that outlives any runnable tasks
 // that will be queued up.
 DISABLE_RUNNABLE_METHOD_REFCOUNT(RLZTracker);
 
 #endif  // defined(OS_WIN)
 
 #endif  // CHROME_BROWSER_RLZ_RLZ_H_