Add MinidumpMemoryWriter, MinidumpMemoryListWriter, and their test

minidump/minidump_test_util.h

Index: minidump/minidump_test_util.h
diff --git a/minidump/minidump_test_util.h b/minidump/minidump_test_util.h
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+// 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.
+
+#ifndef CRASHPAD_MINIDUMP_MINIDUMP_TEST_UTIL_H_
+#define CRASHPAD_MINIDUMP_MINIDUMP_TEST_UTIL_H_
+
+#include <dbghelp.h>
+#include <stdint.h>
+
+namespace crashpad {
+namespace test {
+
+//! \brief Verifies, via gtest assertions, that a MINIDUMP_HEADER contains
+//!     expected values.
+//!
+//! All fields in the MINIDUMP_HEADER will be evaluated. Most are compared to
+//! their correct default values. MINIDUMP_HEADER::NumberOfStreams is compared
+//! to \a streams, and MINIDUMP_HEADER::TimeDateStamp is compared to \a
+//! timestamp. Most fields are checked with nonfatal EXPECT-style assertions,
+//! but MINIDUMP_HEADER::NumberOfStreams and MINIDUMP_HEADER::StreamDirectoryRva
+//! are checked with fatal ASSERT-style assertions, because they must be
+//! correct in order for processing of the minidump to continue.
+void VerifyMinidumpHeader(const MINIDUMP_HEADER* header,
+                          uint32_t streams,
+                          uint32_t timestamp);
+
+}  // namespace test
+}  // namespace crashpad
+
+#endif  // CRASHPAD_MINIDUMP_MINIDUMP_TEST_UTIL_H_