Add MinidumpSystemInfoWriter::InitializeFromSnapshot() and its test

minidump/minidump_system_info_writer.h

 // 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 11 matching lines @@
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "minidump/minidump_extensions.h"
 #include "minidump/minidump_stream_writer.h"
 #include "minidump/minidump_writable.h"
 
 namespace crashpad {
 
+class SystemSnapshot;
+
 namespace internal {
 class MinidumpUTF16StringWriter;
 }  // namespace internal
 
 //! \brief The writer for a MINIDUMP_SYSTEM_INFO stream in a minidump file.
 class MinidumpSystemInfoWriter final : public internal::MinidumpStreamWriter {
  public:
   MinidumpSystemInfoWriter();
   ~MinidumpSystemInfoWriter() override;
 
+  //! \brief Initializes MINIDUMP_SYSTEM_INFO based on \a system_snapshot.
+  //!
+  //! \param[in] system_snapshot The system snapshot to use as source data.
+  //!
+  //! \note Valid in #kStateMutable. No mutator methods may be called before
+  //!     this method, and it is not normally necessary to call any mutator
+  //!     methods after this method.
+  void InitializeFromSnapshot(const SystemSnapshot* system_snapshot);
+
   //! \brief Sets MINIDUMP_SYSTEM_INFO::ProcessorArchitecture.
   void SetCPUArchitecture(MinidumpCPUArchitecture processor_architecture) {
     system_info_.ProcessorArchitecture = processor_architecture;
   }
 
   //! \brief Sets MINIDUMP_SYSTEM_INFO::ProcessorLevel and
   //!     MINIDUMP_SYSTEM_INFO::ProcessorRevision.
   void SetCPULevelAndRevision(uint16_t processor_level,
                               uint16_t processor_revision) {
     system_info_.ProcessorLevel = processor_level;
@@ skipping 123 matching lines @@
  private:
   MINIDUMP_SYSTEM_INFO system_info_;
   scoped_ptr<internal::MinidumpUTF16StringWriter> csd_version_;
 
   DISALLOW_COPY_AND_ASSIGN(MinidumpSystemInfoWriter);
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_MINIDUMP_MINIDUMP_SYSTEM_INFO_WRITER_H_