Run the later parts of startup as UI thread tasks

content/browser/browser_main.cc

Index: content/browser/browser_main.cc
diff --git a/content/browser/browser_main.cc b/content/browser/browser_main.cc
index 640ccee5ac715ca9ebc576895bc89b0427da12df..94b8428f8440c9e039d9b517992ef456327f9f8f 100644
--- a/content/browser/browser_main.cc
+++ b/content/browser/browser_main.cc
@@ -7,6 +7,7 @@
 #include "base/debug/trace_event.h"
 #include "content/common/content_constants_internal.h"
 #include "content/public/browser/browser_main_runner.h"
+#include "content/public/common/startup_task_runner.h"
 
 namespace content {
 
@@ -19,7 +20,11 @@ int BrowserMain(const MainFunctionParams& parameters) {
 
   scoped_ptr<BrowserMainRunner> main_runner(BrowserMainRunner::Create());
 
-  int exit_code = main_runner->Initialize(parameters);
+  scoped_refptr<content::StartupTaskRunner> startup_task_runner =
+      make_scoped_refptr(new content::StartupTaskRunner(
+          content::StartupTaskRunner::IMMEDIATE, NULL));
+
+  int exit_code = main_runner->Initialize(parameters, startup_task_runner);
   if (exit_code >= 0)
     return exit_code;