Remove base::MessageLoop::{Quit,QuitClosure} functions

ppapi/proxy/ppb_message_loop_proxy.cc

Index: ppapi/proxy/ppb_message_loop_proxy.cc
diff --git a/ppapi/proxy/ppb_message_loop_proxy.cc b/ppapi/proxy/ppb_message_loop_proxy.cc
index 3d29a7b9a89201f1e700bda0d28a194d39117f24..c9ea5a802bcbf14ac34f244b074d5b7491e9524d 100644
--- a/ppapi/proxy/ppb_message_loop_proxy.cc
+++ b/ppapi/proxy/ppb_message_loop_proxy.cc
@@ -141,9 +141,9 @@ int32_t MessageLoopResource::PostQuit(PP_Bool should_destroy) {
     should_destroy_ = true;
 
   if (IsCurrent() && nested_invocations_ > 0)
-    loop_->Quit();
+    loop_->QuitWhenIdle();
   else
-    PostClosure(FROM_HERE, base::MessageLoop::QuitClosure(), 0);
+    PostClosure(FROM_HERE, base::MessageLoop::QuitWhenIdleClosure(), 0);
   return PP_OK;
 }