Pending tasks in a message loop should be deleted before shutting down Blink

base/message_loop/message_loop.h

Index: base/message_loop/message_loop.h
diff --git a/base/message_loop/message_loop.h b/base/message_loop/message_loop.h
index 8db1e77daf38b21e191df7c0108b6abe0d6571fe..2516ccc72bdd4943808d1fcf52f51ee404e27337 100644
--- a/base/message_loop/message_loop.h
+++ b/base/message_loop/message_loop.h
@@ -371,6 +371,9 @@ class BASE_EXPORT MessageLoop : public MessagePump::Delegate {
   void AddTaskObserver(TaskObserver* task_observer);
   void RemoveTaskObserver(TaskObserver* task_observer);
 
+  // Flushes all pending tasks in this message loop.

[jamesr, 2014/09/24 04:57:26]

i really think if we need to patch base/ for this then we're doing something
wrong

+  void FlushPendingTasks();
+
 #if defined(OS_WIN)
   void set_os_modal_loop(bool os_modal_loop) {
     os_modal_loop_ = os_modal_loop;