Add RAPPOR metrics of ServiceWorker.ControlledPage

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index d3e8e0d53116cdbc0d0945946929898bfcae7d4e..2c5095b9c9715e6fbb3c6a41d0860f2d01e0b0a2 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -40,6 +40,7 @@
 #include "chrome/browser/media/midi_permission_context.h"
 #include "chrome/browser/media/midi_permission_context_factory.h"
 #include "chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.h"
+#include "chrome/browser/metrics/rappor/sampling.h"
 #include "chrome/browser/nacl_host/nacl_browser_delegate_impl.h"
 #include "chrome/browser/net/chrome_net_log.h"
 #include "chrome/browser/notifications/desktop_notification_service.h"
@@ -2552,6 +2553,12 @@ void ChromeContentBrowserClient::OpenURL(
 #endif
 }
 
+void ChromeContentBrowserClient::RecordURLMetric(const std::string& metric,
+                                                 const GURL& url) {
+  if (url.is_valid())
+    rappor::SampleDomainAndRegistryFromGURL(metric, url);
+}
+
 content::DevToolsManagerDelegate*
 ChromeContentBrowserClient::GetDevToolsManagerDelegate() {
 #if defined(OS_ANDROID)