Remove obsolete TODO.

ppapi/proxy/url_loader_resource.cc

Index: ppapi/proxy/url_loader_resource.cc
diff --git a/ppapi/proxy/url_loader_resource.cc b/ppapi/proxy/url_loader_resource.cc
index 4ac345a2b80686797fd177c4425b32a83336de34..ccf6f54eac05e0e7ca4ba235faf0448f3b5e7aee 100644
--- a/ppapi/proxy/url_loader_resource.cc
+++ b/ppapi/proxy/url_loader_resource.cc
@@ -219,7 +219,6 @@ void URLLoaderResource::Close() {
   Post(RENDERER, PpapiHostMsg_URLLoader_Close());
 
   // Abort the callbacks, the plugin doesn't want to be called back after this.
-  // TODO(brettw) this should fix bug 69457, mark it fixed. ============
   if (TrackedCallback::IsPending(pending_callback_))
     pending_callback_->PostAbort();
 }