Add HTTPTransport, a Mac implementation, and an end-to-end test.

util/net/http_transport_mac.h

+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef CRASHPAD_UTIL_NET_HTTP_MULTIPART_UPLOAD_MAC_H_
+#define CRASHPAD_UTIL_NET_HTTP_MULTIPART_UPLOAD_MAC_H_
+
+#include <string>

[Mark Mentovai, 2014/10/30 21:13:54]

Unused.

[Robert Sesek, 2014/10/31 14:48:14]

Now this entire file is.

+
+#include "base/basictypes.h"
+#include "util/net/http_transport.h"
+
+namespace crashpad {
+
+//! \brief An implementation of HTTPTransport that uses OS X Foundation to
+//!     execute the HTTP request.
+class HTTPTransportMac final : public HTTPTransport {
+ public:
+  HTTPTransportMac();
+  ~HTTPTransportMac() override;
+
+  bool ExecuteSynchronously() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(HTTPTransportMac);
+};
+
+}  // namespace crashpad
+
+#endif  // CRASHPAD_UTIL_NET_HTTP_MULTIPART_UPLOAD_MAC_H_