Adds a --deterministic-fetch flag to headless_shell

headless/public/util/http_url_fetcher.h

Index: headless/public/util/http_url_fetcher.h
diff --git a/headless/public/util/http_url_fetcher.h b/headless/public/util/http_url_fetcher.h
new file mode 100644
index 0000000000000000000000000000000000000000..b74b3e1399e314ec0e92362b5497fc1a1e0fc446
--- /dev/null
+++ b/headless/public/util/http_url_fetcher.h
@@ -0,0 +1,41 @@
+// 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 HEADLESS_PUBLIC_UTIL_HTTP_URL_FETCHER_H_
+#define HEADLESS_PUBLIC_UTIL_HTTP_URL_FETCHER_H_
+
+#include "base/macros.h"
+#include "headless/public/util/url_fetcher.h"
+
+namespace net {
+class URLRequestContext;
+class URLRequestJobFactory;
+}  // namespace
+
+namespace headless {
+
+// A simple URLFetcher that wraps a net::URLRequest.

[Sami, 2016/09/23 14:27:29]

net::URLRequestContext?

[alex clarke (OOO till 29th), 2016/09/23 16:40:27]

Done.

+class HttpUrlFetcher : public URLFetcher {

[Sami, 2016/09/23 14:27:29]

nit: "URL" to match the interface. Maybe we should call this ContextURLFetcher
or something since the implementation doesn't seem to have much to do with http
per se?

[alex clarke (OOO till 29th), 2016/09/23 16:40:26]

Done.

+ public:
+  explicit HttpUrlFetcher(const net::URLRequestContext* url_request_context);
+  ~HttpUrlFetcher() override;
+
+  // URLFetcher implementation:
+  void StartFetch(const GURL& rewritten_url,
+                  const std::string& method,
+                  const net::HttpRequestHeaders& request_headers,
+                  ResultListener* result_listener) override;
+
+ private:
+  class Delegate;
+
+  const net::URLRequestContext* url_request_context_;
+  std::unique_ptr<Delegate> delagate_;

[Sami, 2016/09/23 14:27:29]

typo: delegate_

[alex clarke (OOO till 29th), 2016/09/23 16:40:26]

Done.

+
+  DISALLOW_COPY_AND_ASSIGN(HttpUrlFetcher);
+};
+
+}  // namespace headless
+
+#endif  // HEADLESS_PUBLIC_UTIL_HTTP_URL_FETCHER_H_