Add MinidumpMemoryWriter, MinidumpMemoryListWriter, and their test

minidump/minidump_misc_info_writer_test.cc

Index: minidump/minidump_misc_info_writer_test.cc
diff --git a/minidump/minidump_misc_info_writer_test.cc b/minidump/minidump_misc_info_writer_test.cc
index 5ccfd8eacfe37cb12afda8ffe4d04708c11e1780..ca22b5929a8cdf40feef8addeb26b73f69164497 100644
--- a/minidump/minidump_misc_info_writer_test.cc
+++ b/minidump/minidump_misc_info_writer_test.cc
@@ -24,12 +24,14 @@
 #include "base/strings/utf_string_conversions.h"
 #include "gtest/gtest.h"
 #include "minidump/minidump_file_writer.h"
+#include "minidump/minidump_test_util.h"
 #include "util/file/string_file_writer.h"
 #include "util/stdlib/strlcpy.h"
 
 namespace {
 
 using namespace crashpad;
+using namespace crashpad::test;
 
 template <typename T>
 void GetMiscInfoStream(const std::string& file_contents, const T** misc_info) {
@@ -44,13 +46,10 @@ void GetMiscInfoStream(const std::string& file_contents, const T** misc_info) {
   const MINIDUMP_HEADER* header =
       reinterpret_cast<const MINIDUMP_HEADER*>(&file_contents[0]);
 
-  EXPECT_EQ(static_cast<uint32_t>(MINIDUMP_SIGNATURE), header->Signature);
-  EXPECT_EQ(static_cast<uint32_t>(MINIDUMP_VERSION), header->Version);
-  ASSERT_EQ(1u, header->NumberOfStreams);
-  ASSERT_EQ(kDirectoryOffset, header->StreamDirectoryRva);
-  EXPECT_EQ(0u, header->CheckSum);
-  EXPECT_EQ(0u, header->TimeDateStamp);
-  EXPECT_EQ(MiniDumpNormal, header->Flags);
+  VerifyMinidumpHeader(header, 1, 0);
+  if (testing::Test::HasFatalFailure()) {
+    return;
+  }
 
   const MINIDUMP_DIRECTORY* directory =
       reinterpret_cast<const MINIDUMP_DIRECTORY*>(