047.patch

--- a/chrome/browser/ui/tab_helpers.cc	2017-10-04 18:07:36.000000000 -0400
+++ b/chrome/browser/ui/tab_helpers.cc	2017-10-08 20:19:27.136157525 -0400
@@ -207,13 +207,17 @@
   HistoryTabHelper::CreateForWebContents(web_contents);
   InfoBarService::CreateForWebContents(web_contents);
   InstallableManager::CreateForWebContents(web_contents);
-  metrics::RendererUptimeWebContentsObserver::CreateForWebContents(
-      web_contents);
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch("enable-metrics")) {
+    metrics::RendererUptimeWebContentsObserver::CreateForWebContents(
+        web_contents);
+  }
   if (content::IsBrowserSideNavigationEnabled())
     MixedContentSettingsTabHelper::CreateForWebContents(web_contents);
   NavigationCorrectionTabObserver::CreateForWebContents(web_contents);
-  NavigationMetricsRecorder::CreateForWebContents(web_contents);
-  chrome::InitializePageLoadMetricsForWebContents(web_contents);
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch("enable-metrics")) {
+    NavigationMetricsRecorder::CreateForWebContents(web_contents);
+    chrome::InitializePageLoadMetricsForWebContents(web_contents);
+  }
   PDFPluginPlaceholderObserver::CreateForWebContents(web_contents);
   PermissionRequestManager::CreateForWebContents(web_contents);
   PopupBlockerTabHelper::CreateForWebContents(web_contents);
@@ -283,8 +287,8 @@
 
 #if defined(OS_WIN) || defined(OS_MACOSX) || \
     (defined(OS_LINUX) && !defined(OS_CHROMEOS))
-  metrics::DesktopSessionDurationObserver::CreateForWebContents(web_contents);
-#endif
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch("enable-metrics"))
+    metrics::DesktopSessionDurationObserver::CreateForWebContents(web_contents);#endif
 
 // --- Feature tab helpers behind flags ---