Make content::ThrottlingURLLoader take a task runner and more efficient.

content/child/url_loader_client_impl.cc

Index: content/child/url_loader_client_impl.cc
diff --git a/content/child/url_loader_client_impl.cc b/content/child/url_loader_client_impl.cc
index 6671134b7ca9032e05ed09aa955d2651cc28cc5b..e49889b3e7b5b30a4f337d2405c92249a639a05a 100644
--- a/content/child/url_loader_client_impl.cc
+++ b/content/child/url_loader_client_impl.cc
@@ -17,8 +17,7 @@ URLLoaderClientImpl::URLLoaderClientImpl(
     int request_id,
     ResourceDispatcher* resource_dispatcher,
     scoped_refptr<base::SingleThreadTaskRunner> task_runner)
-    : binding_(this),
-      request_id_(request_id),
+    : request_id_(request_id),
       resource_dispatcher_(resource_dispatcher),
       task_runner_(std::move(task_runner)),
       weak_factory_(this) {}
@@ -28,10 +27,6 @@ URLLoaderClientImpl::~URLLoaderClientImpl() {
     body_consumer_->Cancel();
 }
 
-void URLLoaderClientImpl::Bind(mojom::URLLoaderClientPtr* client_ptr) {
-  binding_.Bind(mojo::MakeRequest(client_ptr), task_runner_);
-}
-
 void URLLoaderClientImpl::SetDefersLoading() {
   is_deferred_ = true;
   if (body_consumer_)