Modify rappor parameters.

chrome/browser/prefs/pref_metrics_service.cc

 // Copyright 2013 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/prefs/pref_metrics_service.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_registry_simple.h"
@@ skipping 64 matching lines @@
   // homepages through the privacy-preserving Rappor service.
   if (!home_page_is_ntp) {
     GURL homepage_url(prefs_->GetString(prefs::kHomePage));
     if (homepage_url.is_valid()) {
       UMA_HISTOGRAM_ENUMERATION(
           "Settings.HomePageEngineType",
           TemplateURLPrepopulateData::GetEngineType(homepage_url),
           SEARCH_ENGINE_MAX);
       if (g_browser_process->rappor_service()) {
         g_browser_process->rappor_service()->RecordSample(
-            "Settings.HomePage",
+            "Settings.HomePage2",
             rappor::ETLD_PLUS_ONE_RAPPOR_TYPE,
             net::registry_controlled_domains::GetDomainAndRegistry(homepage_url,
                 net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES));
       }
     }
   }
 
   int restore_on_startup = prefs_->GetInteger(prefs::kRestoreOnStartup);
   UMA_HISTOGRAM_ENUMERATION("Settings.StartupPageLoadSettings",
                             restore_on_startup, kSessionStartupPrefValueMax);
@@ skipping 127 matching lines @@
 }
 
 bool PrefMetricsService::Factory::ServiceIsNULLWhileTesting() const {
   return false;
 }
 
 content::BrowserContext* PrefMetricsService::Factory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
   return chrome::GetBrowserContextRedirectedInIncognito(context);
 }