Implement upload progress handling in Mojo loading

content/child/url_loader_client_impl.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/child/url_loader_client_impl.h"
 
 #include "base/callback.h"
 #include "base/single_thread_task_runner.h"
 #include "content/child/resource_dispatcher.h"
 #include "content/child/url_response_body_consumer.h"
@@ skipping 163 matching lines @@
   if (is_deferred_) {
     deferred_messages_.push_back(message);
   } else if (deferred_messages_.size() > 0) {
     deferred_messages_.push_back(message);
     FlushDeferredMessages();
   } else {
     resource_dispatcher_->DispatchMessage(message);
   }
 }
 
+void URLLoaderClientImpl::OnUploadProgress(int64_t current_position,
+                                           int64_t total_size,
+                                           const base::Closure& ack_callback) {
+  resource_dispatcher_->OnMessageReceived(
+      ResourceMsg_UploadProgress(request_id_, current_position, total_size));
+  ack_callback.Run();
+}
+
 }  // namespace content