[chromedriver] Implement connecting to devtools and loading a page.

chrome/test/chromedriver/net/net_util.h

+// Copyright (c) 2012 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 CHROME_TEST_CHROMEDRIVER_NET_NET_UTIL_H_
+#define CHROME_TEST_CHROMEDRIVER_NET_NET_UTIL_H_
+
+#include <string>
+
+class GURL;
+class URLRequestContextGetter;
+
+// Synchronously fetches data from a GET HTTP request to the given URL.
+// Returns true if response is 200 OK and sets response body to |response|.
+bool FetchUrl(const GURL& url,
+              URLRequestContextGetter* getter,
+              std::string* response);
+
+#endif  // CHROME_TEST_CHROMEDRIVER_NET_NET_UTIL_H_