Reorganize Multiprocess and implement for Windows

util/test/multiprocess_exec.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,
 // 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_UTIL_TEST_MULTIPROCESS_EXEC_H_
 #define CRASHPAD_UTIL_TEST_MULTIPROCESS_EXEC_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
+#include "build/build_config.h"
 #include "util/test/multiprocess.h"
 
 namespace crashpad {
 namespace test {
 
 //! \brief Manages an `exec()`-based multiprocess test.
 //!
 //! These tests are based on `fork()` and `exec()`. The parent process is able
 //! to communicate with the child in the same manner as a base-class
 //! Multiprocess parent. The read and write pipes appear in the child process on
@@ skipping 23 matching lines @@
 
   // Multiprocess:
   void PreFork() override;
 
  private:
   // Multiprocess:
   void MultiprocessChild() override;
 
   std::string command_;
   std::vector<std::string> arguments_;
+#if defined(OS_POSIX)
   std::vector<const char*> argv_;
+#elif defined(OS_WIN)
+  std::wstring command_line_;
+#endif  // OS_POSIX
 
   DISALLOW_COPY_AND_ASSIGN(MultiprocessExec);
 };
 
 }  // namespace test
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_TEST_MULTIPROCESS_EXEC_H_