[chromedriver] Implement proxy capability.

chrome/test/chromedriver/capabilities_parser.h

+// Copyright (c) 2013 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_CAPABILITIES_PARSER_H_
+#define CHROME_TEST_CHROMEDRIVER_CAPABILITIES_PARSER_H_
+
+#include <string>
+
+#include "base/callback_forward.h"
+#include "base/files/file_path.h"
+#include "base/values.h"
+
+class Status;
+
+struct Capabilities {
+  Capabilities();
+  ~Capabilities();
+
+  bool HasAndroidPackage();
+
+  std::string android_package;
+
+  base::FilePath chrome_exe;
+  std::string log_path;
+  base::ListValue args_list;
+  const base::DictionaryValue* prefs_dict;
+  const base::DictionaryValue* local_state_dict;
+  const base::ListValue* extensions_list;
+};
+
+Status ParseCapabilities(
+    const base::DictionaryValue& desired_caps,
+    Capabilities* capabilities,
+    const base::Callback<bool(const base::FilePath&)>& file_checker);
+
+#endif  // CHROME_TEST_CHROMEDRIVER_CAPABILITIES_PARSER_H_