Shutdown renderer main message loop before blink::shutdown()

content/child/child_thread_impl.h

Index: content/child/child_thread_impl.h
diff --git a/content/child/child_thread_impl.h b/content/child/child_thread_impl.h
index 94bd0ba3a76112276d26426d75975b9ee733f7b6..728346e9d07e5e6c43cba52ebf07652353c99bf0 100644
--- a/content/child/child_thread_impl.h
+++ b/content/child/child_thread_impl.h
@@ -182,6 +182,10 @@ class CONTENT_EXPORT ChildThreadImpl
 
   base::MessageLoop* message_loop() const { return message_loop_; }
 
+  base::SingleThreadTaskRunner* main_task_runner() const {

[kinuko, 2016/08/09 14:12:18]

main_thread_->main_task_runner() looks slightly cryptic, what 'main' stands for
here? 

+    return main_task_runner_.get();
+  }
+
   // Returns the one child thread. Can only be called on the main thread.
   static ChildThreadImpl* current();
 
@@ -272,6 +276,8 @@ class CONTENT_EXPORT ChildThreadImpl
 
   base::MessageLoop* message_loop_;
 
+  scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
+
   std::unique_ptr<FileSystemDispatcher> file_system_dispatcher_;
 
   std::unique_ptr<QuotaDispatcher> quota_dispatcher_;