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

content/child/url_loader_client_impl.h

Index: content/child/url_loader_client_impl.h
diff --git a/content/child/url_loader_client_impl.h b/content/child/url_loader_client_impl.h
index 39fb7dbb5f2245e7b1a859e5b3a90f23d86764df..872c6782065a7a17abc443ebde59bc60d7317cb1 100644
--- a/content/child/url_loader_client_impl.h
+++ b/content/child/url_loader_client_impl.h
@@ -13,7 +13,6 @@
 #include "content/common/content_export.h"
 #include "content/common/url_loader.mojom.h"
 #include "ipc/ipc_message.h"
-#include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/system/data_pipe.h"
 
 namespace base {
@@ -37,8 +36,6 @@ class CONTENT_EXPORT URLLoaderClientImpl final : public mojom::URLLoaderClient {
                       scoped_refptr<base::SingleThreadTaskRunner> task_runner);
   ~URLLoaderClientImpl() override;
 
-  void Bind(mojom::URLLoaderClientPtr* client_ptr);
-
   // Sets |is_deferred_|. From now, the received messages are not dispatched
   // to clients until UnsetDefersLoading is called.
   void SetDefersLoading();
@@ -69,7 +66,6 @@ class CONTENT_EXPORT URLLoaderClientImpl final : public mojom::URLLoaderClient {
   bool NeedsStoringMessage() const;
   void StoreAndDispatch(const IPC::Message& message);
 
-  mojo::Binding<mojom::URLLoaderClient> binding_;
   scoped_refptr<URLResponseBodyConsumer> body_consumer_;
   mojom::DownloadedTempFilePtr downloaded_file_;
   std::vector<IPC::Message> deferred_messages_;