minidump: Use forward declarations in more places

minidump/minidump_file_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_file_writer.h"
 
 #include "base/logging.h"
 #include "minidump/minidump_writer_util.h"
+#include "util/file/file_writer.h"
 #include "util/numeric/safe_assignment.h"
 
 namespace crashpad {
 
 MinidumpFileWriter::MinidumpFileWriter()
     : MinidumpWritable(), header_(), streams_(), stream_types_() {
   // Don’t set the signature field right away. Leave it set to 0, so that a
   // partially-written minidump file isn’t confused for a complete and valid
   // one. The header will be rewritten in WriteToFile().
   header_.Signature = 0;
@@ skipping 123 matching lines @@
   for (internal::MinidumpStreamWriter* stream : streams_) {
     iov.iov_len = sizeof(MINIDUMP_DIRECTORY);
     iov.iov_base = stream->DirectoryListEntry();
     iovecs.push_back(iov);
   }
 
   return file_writer->WriteIoVec(&iovecs);
 }
 
 }  // namespace crashpad