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diff --git a/src/client/windows/crash_generation/minidump_generator.h b/src/client/windows/crash_generation/minidump_generator.h
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+// Copyright (c) 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef CLIENT_WINDOWS_CRASH_GENERATION_MINIDUMP_GENERATION_H__
+#define CLIENT_WINDOWS_CRASH_GENERATION_MINIDUMP_GENERATION_H__
+
+#include <Windows.h>
+#include <DbgHelp.h>
+#include <list>
+#include "google_breakpad/common/minidump_format.h"
+
+namespace google_breakpad {
+
+// Abstraction for various objects and operations needed to generate
+// minidump on Windows. This abstraction is useful to hide all the gory
+// details for minidump generation and provide a clean interface to
+// the clients to generate minidumps.
+class MinidumpGenerator {
+ public:
+  // Creates an instance with the given dump path.
+  explicit MinidumpGenerator(const std::wstring& dump_path);
+
+  ~MinidumpGenerator();
+
+  // Writes the minidump with the given parameters.
+  bool WriteMinidump(HANDLE process_handle,
+                     DWORD process_id,
+                     DWORD thread_id,
+                     DWORD requesting_thread_id,
+                     EXCEPTION_POINTERS* exception_pointers,
+                     MDRawAssertionInfo* assert_info,
+                     MINIDUMP_TYPE dump_type,
+                     bool is_client_pointers);
+
+ private:
+  // Function pointer type for MiniDumpWriteDump, which is looked up
+  // dynamically.
+  typedef BOOL (WINAPI* MiniDumpWriteDumpType)(
+      HANDLE hProcess,
+      DWORD ProcessId,
+      HANDLE hFile,
+      MINIDUMP_TYPE DumpType,
+      CONST PMINIDUMP_EXCEPTION_INFORMATION ExceptionParam,
+      CONST PMINIDUMP_USER_STREAM_INFORMATION UserStreamParam,
+      CONST PMINIDUMP_CALLBACK_INFORMATION CallbackParam);
+
+  // Function pointer type for UuidCreate, which is looked up dynamically.
+  typedef RPC_STATUS (RPC_ENTRY* UuidCreateType)(UUID* Uuid);
+
+  // Loads the appropriate DLL lazily in a thread safe way.
+  HMODULE GetDbghelpModule();
+
+  // Loads the appropriate DLL and gets a pointer to the MiniDumpWriteDump
+  // function lazily and in a thread-safe manner.
+  MiniDumpWriteDumpType GetWriteDump();
+
+  // Loads the appropriate DLL lazily in a thread safe way.
+  HMODULE GetRpcrt4Module();
+
+  // Loads the appropriate DLL and gets a pointer to the UuidCreate
+  // function lazily and in a thread-safe manner.
+  UuidCreateType GetCreateUuid();
+
+  // Returns the path for the file to write dump to.
+  bool GenerateDumpFilePath(std::wstring* file_path);
+
+  // Handle to dynamically loaded DbgHelp.dll.
+  HMODULE dbghelp_module_;
+
+  // Pointer to the MiniDumpWriteDump function.
+  MiniDumpWriteDumpType write_dump_;
+
+  // Handle to dynamically loaded rpcrt4.dll.
+  HMODULE rpcrt4_module_;
+
+  // Pointer to the UuidCreate function.
+  UuidCreateType create_uuid_;
+
+  // Folder path to store dump files.
+  std::wstring dump_path_;
+
+  // Critical section to sychronize action of loading modules dynamically.
+  CRITICAL_SECTION module_load_sync_;
+
+  // Critical section to synchronize action of dynamically getting function
+  // addresses from modules.
+  CRITICAL_SECTION get_proc_address_sync_;
+};
+
+}  // namespace google_breakpad
+
+#endif  // CLIENT_WINDOWS_CRASH_GENERATION_MINIDUMP_GENERATION_H__