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

content/public/test/mock_render_thread.cc

Index: content/public/test/mock_render_thread.cc
diff --git a/content/public/test/mock_render_thread.cc b/content/public/test/mock_render_thread.cc
index 34cabd753dd753bcd121efd895960cffd2a70cff..40b3046f326d1e05d3d47c875682fd9270e4f2f1 100644
--- a/content/public/test/mock_render_thread.cc
+++ b/content/public/test/mock_render_thread.cc
@@ -78,9 +78,9 @@ IPC::SyncMessageFilter* MockRenderThread::GetSyncMessageFilter() {
   return NULL;
 }
 
-scoped_refptr<base::MessageLoopProxy>
-    MockRenderThread::GetIOMessageLoopProxy() {
-  return scoped_refptr<base::MessageLoopProxy>();
+scoped_refptr<base::SingleThreadTaskRunner>
+MockRenderThread::GetIOMessageLoopProxy() {
+  return scoped_refptr<base::SingleThreadTaskRunner>();
 }
 
 void MockRenderThread::AddRoute(int32 routing_id, IPC::Listener* listener) {