Improve process launch handle sharing API.

base/win/wait_chain_unittest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/win/wait_chain.h"
 
 #include <memory>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 172 matching lines @@
 
 // Start a child process and passes the |mutex| and the |sync_event| to the
 // command line.
 Process StartChildProcess(HANDLE mutex, HANDLE sync_event) {
   CommandLine command_line = GetMultiProcessTestChildBaseCommandLine();
 
   AppendSwitchHandle(&command_line, "mutex", mutex);
   AppendSwitchHandle(&command_line, "sync_event", sync_event);
 
   LaunchOptions options;
-  HandlesToInheritVector handle_vector;
-  handle_vector.push_back(mutex);
-  handle_vector.push_back(sync_event);
-  options.handles_to_inherit = &handle_vector;
+  options.handles_to_inherit.push_back(mutex);
+  options.handles_to_inherit.push_back(sync_event);
   base::SpawnChildResult spawn_result =
       SpawnMultiProcessTestChild("WaitChainTestProc", command_line, options);
   return std::move(spawn_result.process);
 }
 
 // Returns true if the |wait_chain| is an alternating sequence of thread objects
 // and synchronization objects.
 bool WaitChainStructureIsCorrect(const WaitChainNodeVector& wait_chain) {
   // Checks thread objects.
   for (size_t i = 0; i < wait_chain.size(); i += 2) {
@@ skipping 104 matching lines @@
   // Unblock child process and wait for it to terminate.
   ASSERT_TRUE(::SetEvent(sync_event.Get()));
   ASSERT_TRUE(child_process.WaitForExit(nullptr));
 
   // The SimpleThread API expect Join() to be called before destruction.
   waiting_thread_3->Join();
 }
 
 }  // namespace win
 }  // namespace base