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

chrome/browser/ui/browser.cc

 // 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.
 
 #include "chrome/browser/ui/browser.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #endif  // OS_WIN
@@ skipping 291 matching lines @@
     local_pref_registrar_.Init(local_state);
     local_pref_registrar_.Add(prefs::kPrintingEnabled, this);
     local_pref_registrar_.Add(prefs::kAllowFileSelectionDialogs, this);
     local_pref_registrar_.Add(prefs::kMetricsReportingEnabled, this);
   }
 
   profile_pref_registrar_.Init(profile_->GetPrefs());
   profile_pref_registrar_.Add(prefs::kDevToolsDisabled, this);
   profile_pref_registrar_.Add(prefs::kEditBookmarksEnabled, this);
   profile_pref_registrar_.Add(prefs::kEnableBookmarkBar, this);
+  profile_pref_registrar_.Add(prefs::kHomePage, this);
   profile_pref_registrar_.Add(prefs::kInstantEnabled, this);
   profile_pref_registrar_.Add(prefs::kIncognitoModeAvailability, this);
   profile_pref_registrar_.Add(prefs::kSearchSuggestEnabled, this);
 
   InitCommandState();
   BrowserList::AddBrowser(this);
 
   // NOTE: These prefs all need to be explicitly destroyed in the destructor
   // or you'll get a nasty surprise when you run the incognito tests.
   encoding_auto_detect_.Init(prefs::kWebKitUsesUniversalDetector,
@@ skipping 1125 matching lines @@
   if (!tab->FocusLocationBarByDefault())
     tab->Focus();
   if (ignore_cache)
     tab->controller().ReloadIgnoringCache(true);
   else
     tab->controller().Reload(true);
 }
 
 void Browser::Home(WindowOpenDisposition disposition) {
   UserMetrics::RecordAction(UserMetricsAction("Home"));
-  OpenURL(GetHomePage(), GURL(), disposition, PageTransition::AUTO_BOOKMARK);
+  OpenURL(GetHomePage(), GURL(), disposition,
+          PageTransition::AUTO_BOOKMARK | PageTransition::HOME_PAGE);
 }
 
 void Browser::OpenCurrentURL() {
   UserMetrics::RecordAction(UserMetricsAction("LoadURL"));
   LocationBar* location_bar = window_->GetLocationBar();
   if (!location_bar)
     return;
 
   WindowOpenDisposition open_disposition =
       location_bar->GetWindowOpenDisposition();
@@ skipping 756 matching lines @@
 #else
   prefs->RegisterBooleanPref(prefs::kClearPluginLSODataEnabled, false);
 #endif
 }
 
 // static
 void Browser::RegisterUserPrefs(PrefService* prefs) {
   prefs->RegisterStringPref(prefs::kHomePage,
                             chrome::kChromeUINewTabURL,
                             PrefService::SYNCABLE_PREF);
+  prefs->RegisterBooleanPref(prefs::kHomePageChanged,
+                             false,
+                             PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kHomePageIsNewTabPage,
                              true,
                              PrefService::SYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kShowHomeButton,
                              false,
                              PrefService::SYNCABLE_PREF);
 #if defined(OS_MACOSX)
   // This really belongs in platform code, but there's no good place to
   // initialize it between the time when the AppController is created
   // (where there's no profile) and the time the controller gets another
@@ skipping 1740 matching lines @@
             IDC_NEW_INCOGNITO_WINDOW,
             available != IncognitoModePrefs::DISABLED);
       } else if (pref_name == prefs::kDevToolsDisabled) {
         UpdateCommandsForDevTools();
         if (profile_->GetPrefs()->GetBoolean(prefs::kDevToolsDisabled))
           g_browser_process->devtools_manager()->CloseAllClientHosts();
       } else if (pref_name == prefs::kEditBookmarksEnabled) {
         UpdateCommandsForBookmarkEditing();
       } else if (pref_name == prefs::kEnableBookmarkBar) {
         UpdateCommandsForBookmarkBar();
+      } else if (pref_name == prefs::kHomePage) {
+        PrefService* pref_service = Source<PrefService>(source).ptr();
+        MarkHomePageAsChanged(pref_service);
       } else if (pref_name == prefs::kAllowFileSelectionDialogs) {
         UpdateSaveAsState(GetContentRestrictionsForSelectedTab());
         UpdateOpenFileState();
       } else {
         NOTREACHED();
       }
       break;
     }
 
     case chrome::NOTIFICATION_TAB_CONTENT_SETTINGS_CHANGED: {
@@ skipping 432 matching lines @@
                             (!window_ || !window_->IsFullscreen());
 #else
   const bool show_main_ui = is_type_tabbed();
 #endif
   command_updater_.UpdateCommandEnabled(IDC_SHOW_BOOKMARK_BAR,
       browser_defaults::bookmarks_enabled &&
       !profile_->GetPrefs()->IsManagedPreference(prefs::kEnableBookmarkBar) &&
       show_main_ui);
 }
 
+void Browser::MarkHomePageAsChanged(PrefService* pref_service) {
+  pref_service->SetBoolean(prefs::kHomePageChanged, true);
+  pref_service->ScheduleSavePersistentPrefs();
+}
+
 void Browser::UpdateSaveAsState(int content_restrictions) {
   bool enabled = !(content_restrictions & CONTENT_RESTRICTION_SAVE);
   PrefService* state = g_browser_process->local_state();
   if (state)
     enabled = enabled && state->GetBoolean(prefs::kAllowFileSelectionDialogs);
 
   command_updater_.UpdateCommandEnabled(IDC_SAVE_PAGE, enabled);
 }
 
 void Browser::UpdateOpenFileState() {
@@ skipping 664 matching lines @@
 }
 
 void Browser::ShowSyncSetup() {
   ProfileSyncService* service =
       profile()->GetOriginalProfile()->GetProfileSyncService();
   if (service->HasSyncSetupCompleted())
     ShowOptionsTab(chrome::kSyncSetupSubPage);
   else
     service->ShowLoginDialog();
 }