Changing multiprocess test SpawnChild to return a struct.

chrome/browser/process_singleton_win_unittest.cc

 // Copyright 2015 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 "chrome/browser/process_singleton.h"
 
 #include <windows.h>
 
 #include <memory>
 
@@ skipping 173 matching lines @@
     continue_event_name_ =
         base::StringPrintf(L"continue-event-%d", base::GetCurrentProcId());
     continue_event_.Set(
         ::CreateEvent(NULL, TRUE, FALSE, continue_event_name_.c_str()));
     ASSERT_TRUE(continue_event_.IsValid());
 
     window_option_ = window_option;
 
     base::LaunchOptions options;
     options.start_hidden = true;
-    browser_victim_ =
+    base::SpawnChildResult spawn_result =
         SpawnChildWithOptions("ProcessSingletonTestProcessMain", options);
+    browser_victim_ = std::move(spawn_result.process);
 
     // Wait for the ready event (or process exit).
     HANDLE handles[] = {ready_event.Get(), browser_victim_.Handle()};
     // The wait should always return because either |ready_event| is signaled or
     // |browser_victim_| died unexpectedly or exited on error.
     DWORD result =
         ::WaitForMultipleObjects(arraysize(handles), handles, FALSE, INFINITE);
     ASSERT_EQ(WAIT_OBJECT_0, result);
   }
 
@@ skipping 112 matching lines @@
   // visible window.
   EXPECT_TRUE(should_kill_called());
 
   // Verify that the hung browser has been terminated with the
   // RESULT_CODE_HUNG exit code.
   int exit_code = 0;
   EXPECT_TRUE(
       browser_victim()->WaitForExitWithTimeout(base::TimeDelta(), &exit_code));
   EXPECT_EQ(content::RESULT_CODE_HUNG, exit_code);
 }