Run the later parts of startup as UI thread tasks

content/public/app/content_main_delegate.cc

Index: content/public/app/content_main_delegate.cc
diff --git a/content/public/app/content_main_delegate.cc b/content/public/app/content_main_delegate.cc
index 88ce4aa912c1b8eb495ed1971711e198297a638c..3a75a8cb65d1216e064aa551cc29dbe7f18b2566 100644
--- a/content/public/app/content_main_delegate.cc
+++ b/content/public/app/content_main_delegate.cc
@@ -72,6 +72,11 @@ ContentRendererClient* ContentMainDelegate::CreateContentRendererClient() {
 #endif
 }
 
+void ContentMainDelegate::SetStartupObserver(
+    scoped_ptr<StartupTaskRunner::Observer> observer) {
+  startup_observer_ = observer.Pass();
+}
+
 ContentUtilityClient* ContentMainDelegate::CreateContentUtilityClient() {
 #if defined(OS_IOS) || defined(CHROME_MULTIPLE_DLL_BROWSER)
   return NULL;
@@ -80,4 +85,8 @@ ContentUtilityClient* ContentMainDelegate::CreateContentUtilityClient() {
 #endif
 }
 
+StartupTaskRunner::Observer* ContentMainDelegate::GetStartupObserver() {
+  return startup_observer_.get();
+}
+
 }  // namespace content