Add MinidumpFileWriter::InitializeFromSnapshot() and its tests

minidump/minidump_exception_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,
@@ skipping 14 matching lines @@
 
 MinidumpExceptionWriter::MinidumpExceptionWriter()
     : MinidumpStreamWriter(), exception_(), context_(nullptr) {
 }
 
 MinidumpExceptionWriter::~MinidumpExceptionWriter() {
 }
 
 void MinidumpExceptionWriter::InitializeFromSnapshot(
     const ExceptionSnapshot* exception_snapshot,
-    const MinidumpThreadIDMap* thread_id_map) {
+    const MinidumpThreadIDMap& thread_id_map) {
   DCHECK_EQ(state(), kStateMutable);
   DCHECK(!context_);
 
-  auto thread_id_it = thread_id_map->find(exception_snapshot->ThreadID());
-  DCHECK(thread_id_it != thread_id_map->end());
+  auto thread_id_it = thread_id_map.find(exception_snapshot->ThreadID());
+  DCHECK(thread_id_it != thread_id_map.end());
   SetThreadID(thread_id_it->second);
 
   SetExceptionCode(exception_snapshot->Exception());
   SetExceptionFlags(exception_snapshot->ExceptionInfo());
   SetExceptionAddress(exception_snapshot->ExceptionAddress());
   SetExceptionInformation(exception_snapshot->Codes());
 
   scoped_ptr<MinidumpContextWriter> context =
       MinidumpContextWriter::CreateFromSnapshot(exception_snapshot->Context());
   SetContext(context.Pass());
@@ skipping 59 matching lines @@
   DCHECK_EQ(state(), kStateWritable);
 
   return file_writer->Write(&exception_, sizeof(exception_));
 }
 
 MinidumpStreamType MinidumpExceptionWriter::StreamType() const {
   return kMinidumpStreamTypeException;
 }
 
 }  // namespace crashpad