Add MinidumpCrashpadInfoWriter and its test

minidump/minidump_crashpad_info_writer.h

Index: minidump/minidump_crashpad_info_writer.h
diff --git a/minidump/minidump_crashpad_info_writer.h b/minidump/minidump_crashpad_info_writer.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_CRASHPAD_INFO_WRITER_H_
+#define CRASHPAD_MINIDUMP_MINIDUMP_CRASHPAD_INFO_WRITER_H_
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "minidump/minidump_extensions.h"
+#include "minidump/minidump_simple_string_dictionary_writer.h"
+#include "minidump/minidump_stream_writer.h"
+#include "minidump/minidump_writable.h"
+#include "util/file/file_writer.h"
+
+namespace crashpad {
+
+//! \brief The writer for a MinidumpCrashpadInfo stream in a minidump file.
+class MinidumpCrashpadInfoWriter final : public internal::MinidumpStreamWriter {
+ public:
+  MinidumpCrashpadInfoWriter();
+  ~MinidumpCrashpadInfoWriter();
+
+  //! \brief Arranges for MinidumpCrashpadInfo::simple_annotations to point to
+  //!     the MinidumpSimpleStringDictionaryWriter object to be written by \a
+  //!     simple_annotations.
+  //!
+  //! \a simple_annotations will become a child of this object in the overall
+  //! tree of internal::MinidumpWritable objects.
+  //!
+  //! \note Valid in #kStateMutable.
+  void SetSimpleAnnotations(
+      MinidumpSimpleStringDictionaryWriter* simple_annotations);
+
+ protected:
+  // MinidumpWritable:
+  bool Freeze() override;
+  size_t SizeOfObject() override;
+  std::vector<MinidumpWritable*> Children() override;
+  bool WriteObject(FileWriterInterface* file_writer) override;
+
+  // MinidumpStreamWriter:
+  MinidumpStreamType StreamType() const override;
+
+ private:
+  MinidumpCrashpadInfo crashpad_info_;
+  MinidumpSimpleStringDictionaryWriter* simple_annotations_;  // weak
+
+  DISALLOW_COPY_AND_ASSIGN(MinidumpCrashpadInfoWriter);
+};
+
+}  // namespace crashpad
+
+#endif  // CRASHPAD_MINIDUMP_MINIDUMP_CRASHPAD_INFO_WRITER_H_