Add MinidumpMiscInfoWriter::InitializeFromSnapshot() and its test

minidump/minidump_system_info_writer_test.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 321 matching lines @@
   system_info_writer->InitializeFromSnapshot(&system_snapshot);
 
   MinidumpFileWriter minidump_file_writer;
   minidump_file_writer.AddStream(system_info_writer.Pass());
 
   StringFileWriter file_writer;
   ASSERT_TRUE(minidump_file_writer.WriteEverything(&file_writer));
 
   const MINIDUMP_SYSTEM_INFO* system_info;
   const MINIDUMP_STRING* csd_version;
-
   ASSERT_NO_FATAL_FAILURE(GetSystemInfoStream(file_writer.string(),
                                               strlen(kOSVersionBuild),
                                               &system_info,
                                               &csd_version));
 
   EXPECT_EQ(expect_system_info.ProcessorArchitecture,
             system_info->ProcessorArchitecture);
   EXPECT_EQ(expect_system_info.ProcessorLevel, system_info->ProcessorLevel);
   EXPECT_EQ(expect_system_info.ProcessorRevision,
             system_info->ProcessorRevision);
@@ skipping 116 matching lines @@
   minidump_file_writer.AddStream(system_info_writer.Pass());
 
   StringFileWriter file_writer;
   ASSERT_DEATH(minidump_file_writer.WriteEverything(&file_writer),
                "csd_version_");
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace crashpad