Run the later parts of startup as UI thread tasks

content/browser/android/android_startup_observer.h

+// TODO: Insert description here. (generated by aberent)
+
+#ifndef CONTENT_BROWSER_ANDROID_ANDROID_STARTUP_OBSERVER_H_
+#define CONTENT_BROWSER_ANDROID_ANDROID_STARTUP_OBSERVER_H_
+
+#include "base/android/jni_android.h"
+
+#include "content/public/common/startup_task_runner.h"
+
+namespace content {
+
+class AndroidStartupObserver : public StartupTaskRunner::Observer {
+ public:
+  AndroidStartupObserver(jobject java_observer);
+  ~AndroidStartupObserver();
+
+  static bool RegisterStartupObserver(JNIEnv* env);
+
+ private:
+  jobject java_observer_;
+
+  virtual void OVERRIDE AllTasksRun();
+
+  DISALLOW_COPY_AND_ASSIGN(AndroidStartupObserver);
+};
+
+}  // namespace content
+#endif  // CONTENT_BROWSER_ANDROID_ANDROID_STARTUP_OBSERVER_H_