PageLoadMetrics renderer and browser implementation.

chrome/browser/ui/tab_helpers.cc

Index: chrome/browser/ui/tab_helpers.cc
diff --git a/chrome/browser/ui/tab_helpers.cc b/chrome/browser/ui/tab_helpers.cc
index 9955afbdb70c2f6bda712722c54b3a7713843bc1..201a483a3f4d8fd207557da5c26f3c63fde1bf0b 100644
--- a/chrome/browser/ui/tab_helpers.cc
+++ b/chrome/browser/ui/tab_helpers.cc
@@ -45,6 +45,7 @@
 #include "components/dom_distiller/core/dom_distiller_switches.h"
 #include "components/history/content/browser/web_contents_top_sites_observer.h"
 #include "components/history/core/browser/top_sites.h"
+#include "components/page_load_metrics/browser/metrics_web_contents_observer.h"
 #include "components/password_manager/core/browser/password_manager.h"
 #include "components/sessions/content/content_live_tab.h"
 #include "components/tracing/tracing_switches.h"
@@ -166,6 +167,8 @@ void TabHelpers::AttachTabHelpers(WebContents* web_contents) {
   NavigationCorrectionTabObserver::CreateForWebContents(web_contents);
   NavigationMetricsRecorder::CreateForWebContents(web_contents);
   sessions::ContentLiveTab::CreateForWebContents(web_contents);
+  page_load_metrics::MetricsWebContentsObserver::CreateForWebContents(
+      web_contents);
   PopupBlockerTabHelper::CreateForWebContents(web_contents);
   PrefsTabHelper::CreateForWebContents(web_contents);
   prerender::PrerenderTabHelper::CreateForWebContents(web_contents);