Add ClientConfig proto, and JSON generation/parsing.

components/data_reduction_proxy/core/common/data_reduction_proxy_client_config_parser.h

Index: components/data_reduction_proxy/core/common/data_reduction_proxy_client_config_parser.h
diff --git a/components/data_reduction_proxy/core/common/data_reduction_proxy_client_config_parser.h b/components/data_reduction_proxy/core/common/data_reduction_proxy_client_config_parser.h
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index 0000000000000000000000000000000000000000..461d94514b6ea110f6071101ac29656f8ecb8d42
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+++ b/components/data_reduction_proxy/core/common/data_reduction_proxy_client_config_parser.h
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+// Copyright 2015 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 COMPONENTS_DATA_REDUCTION_PROXY_CORE_COMMON_DATA_REDUCTION_PROXY_CLIENT_CONFIG_RESPONSE_PARSER_H_
+#define COMPONENTS_DATA_REDUCTION_PROXY_CORE_COMMON_DATA_REDUCTION_PROXY_CLIENT_CONFIG_RESPONSE_PARSER_H_
+
+#include <string>
+
+#include "components/data_reduction_proxy/proto/client_config.pb.h"
+#include "net/proxy/proxy_server.h"
+
+namespace base {
+class Time;
+}
+
+namespace data_reduction_proxy {
+
+namespace config_parser {
+
+// Returns a string representation (which is actually the string representation
+// of ProxyServer_ProxyScheme) of a |net::ProxyServer::Scheme|.
+std::string GetSchemeString(net::ProxyServer::Scheme scheme);
+
+// Returns the |net::ProxyServer::Scheme| for a ProxyServer_ProxyScheme.
+net::ProxyServer::Scheme SchemeFromProxyScheme(
+    ProxyServer_ProxyScheme proxy_scheme);
+
+// Retrieves the ProxyServer_ProxyScheme for its string representation.
+ProxyServer_ProxyScheme GetProxyScheme(const std::string& scheme);
+
+// Returns the ISO-8601 representation of |time|.
+std::string TimeToISO8601(const base::Time& time);
+
+// Parses an ISO-8601 time string into a Timestamp proto.
+bool ISO8601ToTimestamp(const std::string& time, Timestamp* timestamp);
+
+// Returns the |base::Time| representation of |timestamp|.
+base::Time TimestampToTime(const Timestamp& timestamp);
+
+// Takes a JSON representation of a |ClientConfig| and populates |config|.
+// Returns false if the JSON has an unexpected structure.
+// TODO(jeremyim): This should be deprecated once gRPC support can be added
+// (which would give the binary proto instead of JSON).
+bool ParseClientConfig(const std::string& config_data, ClientConfig* config);
+
+}  // namespace config_parser
+
+}  // namespace data_reduction_proxy
+
+#endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_COMMON_DATA_REDUCTION_PROXY_CLIENT_CONFIG_RESPONSE_PARSER_H_