PlzNavigate: Add first version of NavigationURLLoader.

content/browser/loader/navigation_url_loader_impl.h

Index: content/browser/loader/navigation_url_loader_impl.h
diff --git a/content/browser/loader/navigation_url_loader_impl.h b/content/browser/loader/navigation_url_loader_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..266549e962ef24773bc29b5c1761b67a1d29a1a7
--- /dev/null
+++ b/content/browser/loader/navigation_url_loader_impl.h
@@ -0,0 +1,39 @@
+// Copyright 2014 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_NAVIGATION_URL_LOADER_IMPL_H_
+#define CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_IMPL_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "content/browser/loader/navigation_url_loader.h"
+
+namespace content {
+
+class NavigationURLLoaderCore;
+
+class NavigationURLLoaderImpl : public NavigationURLLoader {
+ public:
+  // The caller is responsible for ensuring that |delegate| outlives the loader.
+  NavigationURLLoaderImpl(BrowserContext* browser_context,
+                          int64 frame_tree_node_id,
+                          const CommonNavigationParams& common_params,
+                          scoped_ptr<NavigationRequestInfo> request_info,
+                          ResourceRequestBody* request_body,
+                          NavigationURLLoader::Delegate* delegate);
+  virtual ~NavigationURLLoaderImpl();
+
+  // Called in response to OnRequestRedirected to continue processing the
+  // request.
+  virtual void FollowRedirect() override;
+
+ private:
+  scoped_refptr<NavigationURLLoaderCore> core_;
+
+  DISALLOW_COPY_AND_ASSIGN(NavigationURLLoaderImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_IMPL_H_