[Startup Tracing] Add --trace-config-file flag

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index bd83892fbfe61f01926a02d90d7b366c08d3b486..24ed4b9109dbb001ea2e671cf69a5c98c037b98b 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -1355,6 +1355,7 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
     switches::kTestType,
     switches::kTouchEvents,
     switches::kTouchTextSelectionStrategy,
+    switches::kTraceConfigFile,
     switches::kTraceToConsole,
     // This flag needs to be propagated to the renderer process for
     // --in-process-webgl.
@@ -1425,7 +1426,7 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
                                  arraysize(kSwitchNames));
 
   if (browser_cmd.HasSwitch(switches::kTraceStartup) &&
-      BrowserMainLoop::GetInstance()->is_tracing_startup()) {
+      BrowserMainLoop::GetInstance()->is_tracing_startup_for_duration()) {
     // Pass kTraceStartup switch to renderer only if startup tracing has not
     // finished.
     renderer_cmd->AppendSwitchASCII(