Made the NavigationTracingObserver always be active whenever background tracing is active

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 08a6d4ed0305f42bd91b3d6484a804f761df6cdd..db5d5806737f5250284d5ac619e14cbf4950a8de 100644
--- a/chrome/browser/ui/tab_helpers.cc
+++ b/chrome/browser/ui/tab_helpers.cc
@@ -246,10 +246,6 @@ void TabHelpers::AttachTabHelpers(WebContents* web_contents) {
         web_contents);
   }
 
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableNavigationTracing) &&
-      base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kTraceUploadURL)) {
+  if (tracing::NavigationTracingObserver::IsEnabled())
     tracing::NavigationTracingObserver::CreateForWebContents(web_contents);
-  }
 }