content/child: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

content/renderer/devtools/devtools_agent_filter.h

Index: content/renderer/devtools/devtools_agent_filter.h
diff --git a/content/renderer/devtools/devtools_agent_filter.h b/content/renderer/devtools/devtools_agent_filter.h
index 5f2ce6411fcd0a8640e49522881353cb4068f875..c8ba6876ec21ce7453627e857986762ab09139eb 100644
--- a/content/renderer/devtools/devtools_agent_filter.h
+++ b/content/renderer/devtools/devtools_agent_filter.h
@@ -14,7 +14,7 @@ struct DevToolsMessageData;
 
 namespace base {
 class MessageLoop;
-class MessageLoopProxy;
+class SingleThreadTaskRunner;
 }
 
 namespace content {
@@ -50,8 +50,7 @@ class DevToolsAgentFilter : public IPC::MessageFilter {
   void RemoveEmbeddedWorkerRoute(int32 routing_id);
 
   base::MessageLoop* render_thread_loop_;
-  // Proxy to the IO message loop.
-  scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
+  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
   int current_routing_id_;
 
   std::set<int32> embedded_worker_routes_;