Remove dependency of ResourceDispatcherHostImpl on RenderViewHostImpl

content/browser/loader/loader_delegate.h

+// 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.
+
+#ifndef CONTENT_BROWSER_LOADER_LOADER_DELEGATE_H_
+#define CONTENT_BROWSER_LOADER_LOADER_DELEGATE_H_
+
+#include <inttypes.h>
+
+#include "net/base/load_states.h"
+
+class GURL;
+
+namespace content {
+
+// Delegate from loader to the rest of content. Lives on the IO thread.
+//
+// This is used for breaking dependencies between content at-large and
+// content/browser/loader which will eventually be moved to a separate
+// networking service. All methods in this interface should be asynchronous,
+// since eventually this will be a Mojo interface. See https://crbug.com/622050
+// and https://crbug.com/598073.
+class LoaderDelegate {
+ public:
+  virtual ~LoaderDelegate() {}
+
+  // Notification that the load state for the route identified by child_id and
+  // route_id has changed.
+  virtual void LoadStateChanged(int child_id,
+                                int route_id,
+                                const GURL& url,
+                                const net::LoadStateWithParam& load_state,
+                                uint64_t upload_position,
+                                uint64_t upload_size) = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_LOADER_LOADER_DELEGATE_H_