chrome: respect --child-clean-exit.

content/app/content_main_runner.cc

 // Copyright (c) 2012 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 "content/public/app/content_main_runner.h"
 
 #include <stdlib.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#if defined(OS_POSIX)
+#include <errno.h>
+#endif  // OS_POSIX
+
 
 #include "base/allocator/allocator_extension.h"
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/debug/trace_event.h"
 #include "base/files/file_path.h"
 #include "base/i18n/icu_util.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ skipping 761 matching lines @@
 
     _Module.Term();
 #endif  // OS_WIN
 
 #if defined(OS_MACOSX)
     autorelease_pool_.reset(NULL);
 #endif
 
     exit_manager_.reset(NULL);
 
+#if defined(OS_POSIX)
+    // Wait for children to exit if --wait-for-children-before-exiting is
+    // passed.
+    if (CommandLine::ForCurrentProcess()->
+        HasSwitch(switches::kWaitForChildrenBeforeExiting)) {
+      for (;;) {
+        if (wait(NULL) < 0 && errno == ECHILD)
+          break;
+      }
+    }
+#endif  // OS_POSIX
+
     delegate_ = NULL;
     is_shutdown_ = true;
   }
 
  private:
   // True if the runner has been initialized.
   bool is_initialized_;
 
   // True if the runner has been shut down.
   bool is_shutdown_;
@@ skipping 16 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
 };
 
 // static
 ContentMainRunner* ContentMainRunner::Create() {
   return new ContentMainRunnerImpl();
 }
 
 }  // namespace content