PageLoadMetrics renderer and browser implementation (deprecated)

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 5f477c0dc193476a09ec612b226bb6f4a0527569..581dba6f20bf8b541b7e70a38600c99a0a907d37 100644
--- a/chrome/browser/ui/tab_helpers.cc
+++ b/chrome/browser/ui/tab_helpers.cc
@@ -54,6 +54,7 @@
 #include "chrome/browser/android/webapps/single_tab_mode_tab_helper.h"
 #include "chrome/browser/ui/android/context_menu_helper.h"
 #include "chrome/browser/ui/android/window_android_helper.h"
+#include "components/page_load_metrics/browser/page_load_metrics_web_contents_observer.h"
 #else
 #include "chrome/browser/banners/app_banner_manager_desktop.h"
 #include "chrome/browser/plugins/plugin_observer.h"
@@ -182,6 +183,10 @@ void TabHelpers::AttachTabHelpers(WebContents* web_contents) {
   SingleTabModeTabHelper::CreateForWebContents(web_contents);
   VoiceSearchTabHelper::CreateForWebContents(web_contents);
   WindowAndroidHelper::CreateForWebContents(web_contents);
+
+  // TODO(bmcquade): run on all platforms once crbug.com/521010 is resolved.
+  page_load_metrics::PageLoadMetricsWebContentsObserver::CreateForWebContents(
+      web_contents);
 #else
   extensions::ChromeExtensionWebContentsObserver::CreateForWebContents(
       web_contents);