minidump: Use forward declarations in more places

minidump/minidump_system_info_writer.cc

 // 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.
 
 #include "minidump/minidump_system_info_writer.h"
 
 #include <string.h>
+#include <sys/types.h>
 
 #include "base/logging.h"
 #include "minidump/minidump_string_writer.h"
+#include "util/file/file_writer.h"
 
 namespace crashpad {
 
 MinidumpSystemInfoWriter::MinidumpSystemInfoWriter()
     : MinidumpStreamWriter(), system_info_(), csd_version_() {
   system_info_.ProcessorArchitecture = kMinidumpCPUArchitectureUnknown;
 }
 
 MinidumpSystemInfoWriter::~MinidumpSystemInfoWriter() {
 }
@@ skipping 112 matching lines @@
   DCHECK_EQ(state(), kStateWritable);
 
   return file_writer->Write(&system_info_, sizeof(system_info_));
 }
 
 MinidumpStreamType MinidumpSystemInfoWriter::StreamType() const {
   return kMinidumpStreamTypeSystemInfo;
 }
 
 }  // namespace crashpad