Hooked the trace event argument whitelist up to the background_trace_manager

content/public/browser/tracing_controller.h

Index: content/public/browser/tracing_controller.h
diff --git a/content/public/browser/tracing_controller.h b/content/public/browser/tracing_controller.h
index 70d608ce9b8eecda5ff632df31e38494fc4ccdda..439b56fa87e231821a4ff61745c074241ccd214d 100644
--- a/content/public/browser/tracing_controller.h
+++ b/content/public/browser/tracing_controller.h
@@ -65,6 +65,9 @@ class TracingController {
   CONTENT_EXPORT static scoped_refptr<TraceDataSink> CreateStringSink(
       const base::Callback<void(base::RefCountedString*)>& callback);
 
+  CONTENT_EXPORT static scoped_refptr<TraceDataSink> CreateStringSink(
+      scoped_refptr<TraceDataEndpoint> endpoint);
+
   CONTENT_EXPORT static scoped_refptr<TraceDataSink> CreateCompressedStringSink(
       scoped_refptr<TraceDataEndpoint> endpoint);