RAPPOR implementation

chrome/browser/prefs/pref_metrics_service.cc

Index: chrome/browser/prefs/pref_metrics_service.cc
diff --git a/chrome/browser/prefs/pref_metrics_service.cc b/chrome/browser/prefs/pref_metrics_service.cc
index 6bbfa4aa0a7e61e98e8097d4662c3c2a15046e41..9d4bc39c634d66017c9bb0d51b42fda1f7d33231 100644
--- a/chrome/browser/prefs/pref_metrics_service.cc
+++ b/chrome/browser/prefs/pref_metrics_service.cc
@@ -28,6 +28,8 @@
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "components/browser_context_keyed_service/browser_context_dependency_manager.h"
+#include "components/rappor/rappor_recorder.h"
+#include "components/rappor/rappor_utils.h"
 #include "crypto/hmac.h"
 #include "grit/browser_resources.h"
 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
@@ -151,6 +153,9 @@ void PrefMetricsService::RecordLaunchPrefs() {
           "Settings.HomePageEngineType",
           TemplateURLPrepopulateData::GetEngineType(homepage_url),
           SEARCH_ENGINE_MAX);
+      std::vector<std::string> url_parts;
+      rappor::GetUrlParts(homepage_url, &url_parts);
+      RAPPOR_SAMPLES("Settings.HomePage", url_parts);
     }
   }