Implement upload progress handling in Mojo loading

content/browser/loader/mojo_async_resource_handler.h

Index: content/browser/loader/mojo_async_resource_handler.h
diff --git a/content/browser/loader/mojo_async_resource_handler.h b/content/browser/loader/mojo_async_resource_handler.h
index 81a2f85a61140d5f7ec0c96435d9da48b3328fc1..ce1d3212396736a75f264660ddbfadf68434ca8c 100644
--- a/content/browser/loader/mojo_async_resource_handler.h
+++ b/content/browser/loader/mojo_async_resource_handler.h
@@ -28,6 +28,7 @@ class URLRequest;
 
 namespace content {
 class ResourceDispatcherHostImpl;
+class UploadProgressTracker;
 struct ResourceResponse;
 
 // Used to complete an asynchronous resource request in response to resource
@@ -96,6 +97,8 @@ class CONTENT_EXPORT MojoAsyncResourceHandler
 
   void OnTransfer(mojom::URLLoaderAssociatedRequest mojo_request,
                   mojom::URLLoaderClientAssociatedPtr url_loader_client);
+  void OnUploadProgressACK();
+  void SendUploadProgress(int64_t current_position, int64_t total_size);
 
   ResourceDispatcherHostImpl* rdh_;
   mojo::AssociatedBinding<mojom::URLLoader> binding_;
@@ -116,6 +119,8 @@ class CONTENT_EXPORT MojoAsyncResourceHandler
   size_t buffer_bytes_read_ = 0;
   scoped_refptr<SharedWriter> shared_writer_;
 
+  std::unique_ptr<UploadProgressTracker> upload_progress_tracker_;
+
   base::WeakPtrFactory<MojoAsyncResourceHandler> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(MojoAsyncResourceHandler);
 };