Run the later parts of startup as UI thread tasks

content/public/test/browser_test_base.cc

Index: content/public/test/browser_test_base.cc
diff --git a/content/public/test/browser_test_base.cc b/content/public/test/browser_test_base.cc
index 66918ab1679ab56a341db812b493879d2a8a6ca6..e87592904d261e07503b341ccf47e2b7637d8e72 100644
--- a/content/public/test/browser_test_base.cc
+++ b/content/public/test/browser_test_base.cc
@@ -97,7 +97,11 @@ void BrowserTestBase::SetUp() {
 
   SetUpInProcessBrowserTestFixture();
 #if defined(OS_ANDROID)
-  BrowserMainRunner::Create()->Initialize(params);
+  scoped_refptr<content::StartupTaskRunner> startup_task_runner =
+      make_scoped_refptr(new content::StartupTaskRunner(
+          content::StartupTaskRunner::IMMEDIATE, NULL));
+
+  BrowserMainRunner::Create()->Initialize(params, startup_task_runner);
   // We are done running the test by now. During teardown we
   // need to be able to perform IO.
   base::ThreadRestrictions::SetIOAllowed(true);