Hooked the trace event argument whitelist up to the background_trace_manager

chrome/browser/tracing/background_tracing_field_trial.cc

Index: chrome/browser/tracing/background_tracing_field_trial.cc
diff --git a/chrome/browser/tracing/background_tracing_field_trial.cc b/chrome/browser/tracing/background_tracing_field_trial.cc
index c509d686c48c0253c618f338ef9a4c6ec7465534..8d459ba0a9a9344ea89bdd87545ad4f9a5ce1344 100644
--- a/chrome/browser/tracing/background_tracing_field_trial.cc
+++ b/chrome/browser/tracing/background_tracing_field_trial.cc
@@ -34,7 +34,7 @@ void OnUploadComplete(TraceCrashServiceUploader* uploader,
   done_callback.Run();
 }
 
-void UploadCallback(const base::RefCountedString* file_contents,
+void UploadCallback(const scoped_refptr<base::RefCountedString>& file_contents,
                     base::Closure callback) {
   TraceCrashServiceUploader* uploader = new TraceCrashServiceUploader(
       g_browser_process->system_request_context());
@@ -66,7 +66,8 @@ void SetupBackgroundTracingFieldTrial() {
     return;
 
   content::BackgroundTracingManager::GetInstance()->SetActiveScenario(
-      config.Pass(), base::Bind(&UploadCallback), true);
+      config.Pass(), base::Bind(&UploadCallback),
+      content::BackgroundTracingManager::ANONYMIZE_DATA);
 }
 
 }  // namespace tracing