Implement upload progress handling in Mojo loading

content/browser/loader/test_url_loader_client.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/browser/loader/test_url_loader_client.h"
 
 #include "base/memory/ref_counted.h"
 #include "base/run_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 44 matching lines @@
       std::string(reinterpret_cast<const char*>(data.data()), data.size());
   if (quit_closure_for_on_receive_cached_metadata_)
     quit_closure_for_on_receive_cached_metadata_.Run();
 }
 
 void TestURLLoaderClient::OnTransferSizeUpdated(int32_t transfer_size_diff) {
   EXPECT_GT(transfer_size_diff, 0);
   body_transfer_size_ += transfer_size_diff;
 }
 
+void TestURLLoaderClient::OnUploadProgress(int64_t current_position,
+                                           int64_t total_size,
+                                           const base::Closure& ack_callback) {

[mmenke, 2017/01/18 17:00:46]

Have sanity checks here?  Haven't received redirects / started loading response
body / isn't completed, current_position is not 0, is >
current_upload_position_. and is <= total_size?  Some of these are overkill for
the current set of tests, just thinking they'd be nice to have if we ever add
more upload tests (Due to a bug or something).

[tzik, 2017/01/19 11:53:09]

Done.

+  current_upload_position_ = current_position;
+  total_upload_size_ = total_size;
+  ack_callback.Run();
+}
+
 void TestURLLoaderClient::OnStartLoadingResponseBody(
     mojo::ScopedDataPipeConsumerHandle body) {
   response_body_ = std::move(body);
   if (quit_closure_for_on_start_loading_response_body_)
     quit_closure_for_on_start_loading_response_body_.Run();
 }
 
 void TestURLLoaderClient::OnComplete(
     const ResourceRequestCompletionStatus& status) {
   has_received_completion_ = true;
@@ skipping 67 matching lines @@
 void TestURLLoaderClient::RunUntilComplete() {
   if (has_received_completion_)
     return;
   base::RunLoop run_loop;
   quit_closure_for_on_complete_ = run_loop.QuitClosure();
   run_loop.Run();
   quit_closure_for_on_complete_.Reset();
 }
 
 }  // namespace content