When cross-site navigations are cancelled, delete the request being transferred

content/browser/renderer_host/cross_site_transferring_request.h

+// 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_RENDERER_HOST_CROSS_SITE_TRANSFERRING_REQUEST_H_
+#define CONTENT_BROWSER_RENDERER_HOST_CROSS_SITE_TRANSFERRING_REQUEST_H_
+
+#include "base/basictypes.h"
+#include "content/common/content_export.h"
+#include "content/public/browser/global_request_id.h"
+
+namespace content {
+
+class CrossSiteResourceHandler;
+
+// A UI thread object that owns a request being transferred.  Deleting the
+// object without releasing the request will delete the underlying URLRequest.
+// This is needed to clean up the URLRequest when a cross site navigation is
+// cancelled.
+class CONTENT_EXPORT CrossSiteTransferringRequest {
+ public:
+  explicit CrossSiteTransferringRequest(GlobalRequestID global_request_id);
+  ~CrossSiteTransferringRequest();
+
+  // Relinquishes ownership of the request, so another process can take
+  // control of it.
+  void ReleaseRequest();
+
+ private:
+  // No need for a weak pointer here - nothing should have ownership of the
+  // cross site request until after |this| is deleted, or ReleaseRequest is
+  // called.
+  GlobalRequestID global_request_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(CrossSiteTransferringRequest);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_CROSS_SITE_TRANSFERRING_REQUEST_H_