Run the later parts of startup as UI thread tasks

content/browser/browser_startup_configuration.h

Index: content/browser/browser_startup_configuration.h
diff --git a/content/browser/browser_startup_configuration.h b/content/browser/browser_startup_configuration.h
new file mode 100644
index 0000000000000000000000000000000000000000..40947a443c710f9e7db3b23178a228b1dc9651bc
--- /dev/null
+++ b/content/browser/browser_startup_configuration.h
@@ -0,0 +1,14 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_BROWSER_BROWSER_STARTUP_CONFIGURATION_H_
+#define CONTENT_BROWSER_BROWSER_STARTUP_CONFIGURATION_H_
+
+namespace content {
+
+bool BrowserMayStartAsynchronously();
+void BrowserStartupComplete(int result);
+
+}  // namespace content
+#endif  // CONTENT_BROWSER_BROWSER_STARTUP_CONFIGURATION_H_