Revert of [Mojo-Loading] Dispatch body data after response is received

content/child/resource_dispatcher.cc

Index: content/child/resource_dispatcher.cc
diff --git a/content/child/resource_dispatcher.cc b/content/child/resource_dispatcher.cc
index 8ddfa8b7bc459a82fe563be3ef50573b2e0629d8..ec4cb56c3551c57b5467e08dfac4f6cec6c5cfec 100644
--- a/content/child/resource_dispatcher.cc
+++ b/content/child/resource_dispatcher.cc
@@ -89,9 +89,6 @@
   }
 
   void OnReceiveResponse(const ResourceResponseHead& response_head) override {
-    has_received_response_ = true;
-    if (body_consumer_)
-      body_consumer_->Start(task_runner_.get());
     resource_dispatcher_->OnMessageReceived(
         ResourceMsg_ReceivedResponse(request_id_, response_head));
   }
@@ -101,8 +98,6 @@
     DCHECK(!body_consumer_);
     body_consumer_ = new URLResponseBodyConsumer(
         request_id_, resource_dispatcher_, std::move(body), task_runner_);
-    if (has_received_response_)
-      body_consumer_->Start(task_runner_.get());
   }
 
   void OnComplete(const ResourceRequestCompletionStatus& status) override {
@@ -122,7 +117,6 @@
   mojo::Binding<mojom::URLLoaderClient> binding_;
   scoped_refptr<URLResponseBodyConsumer> body_consumer_;
   const int request_id_;
-  bool has_received_response_ = false;
   ResourceDispatcher* const resource_dispatcher_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 };