Add ProcessSnapshotMinidump, the beginning of the minidump variant of the Snapshot family

snapshot/minidump/process_snapshot_minidump.h

Index: snapshot/minidump/process_snapshot_minidump.h
diff --git a/snapshot/minidump/process_snapshot_minidump.h b/snapshot/minidump/process_snapshot_minidump.h
new file mode 100644
index 0000000000000000000000000000000000000000..9a7f84af1eb3ee2f301c0a46f999a794e0a9e1b1
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+++ b/snapshot/minidump/process_snapshot_minidump.h
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+// Copyright 2015 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_SNAPSHOT_MINIDUMP_PROCESS_SNAPSHOT_MINIDUMP_H_
+#define CRASHPAD_SNAPSHOT_MINIDUMP_PROCESS_SNAPSHOT_MINIDUMP_H_
+
+#include <sys/time.h>
+#include <windows.h>
+#include <dbghelp.h>
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "minidump/minidump_extensions.h"
+#include "snapshot/exception_snapshot.h"
+#include "snapshot/module_snapshot.h"
+#include "snapshot/process_snapshot.h"
+#include "snapshot/system_snapshot.h"
+#include "snapshot/thread_snapshot.h"
+#include "util/file/file_reader.h"
+#include "util/misc/initialization_state_dcheck.h"
+
+namespace crashpad {
+
+//! \brief A ProcessSnapshot based on a minidump file.
+class ProcessSnapshotMinidump final : public ProcessSnapshot {
+ public:
+  ProcessSnapshotMinidump();
+  ~ProcessSnapshotMinidump() override;
+
+  //! \brief Initializes the object.
+  //!
+  //! \param[in] file_reader A file reader corresponding to a minidump file.
+  //!     The file reader must support seeking.
+  //!
+  //! \return `true` if the snapshot could be created, `false` otherwise with
+  //!     an appropriate message logged.
+  bool Initialize(FileReaderInterface* file_reader);
+
+  // ProcessSnapshot:
+
+  pid_t ProcessID() const override;
+  pid_t ParentProcessID() const override;
+  void SnapshotTime(timeval* snapshot_time) const override;
+  void ProcessStartTime(timeval* start_time) const override;
+  void ProcessCPUTimes(timeval* user_time, timeval* system_time) const override;
+  const std::map<std::string, std::string>& AnnotationsSimpleMap()
+      const override;
+  const SystemSnapshot* System() const override;
+  std::vector<const ThreadSnapshot*> Threads() const override;
+  std::vector<const ModuleSnapshot*> Modules() const override;
+  const ExceptionSnapshot* Exception() const override;
+
+ private:
+  // Initializes data carried in a MinidumpCrashpadInfo stream on behalf of
+  // Initialize().
+  void InitializeCrashpadInfo();
+
+  MINIDUMP_HEADER header_;
+  std::vector<MINIDUMP_DIRECTORY> stream_directory_;
+  std::map<MinidumpStreamType, const MINIDUMP_LOCATION_DESCRIPTOR*> stream_map_;
+  MinidumpCrashpadInfo crashpad_info_;
+  std::map<std::string, std::string> annotations_simple_map_;
+  FileReaderInterface* file_reader_;  // weak
+  InitializationStateDcheck initialized_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProcessSnapshotMinidump);
+};
+
+}  // namespace crashpad
+
+#endif  // CRASHPAD_SNAPSHOT_MINIDUMP_PROCESS_SNAPSHOT_MINIDUMP_H_