SandboxIPCProcess: make shutdown mechanism explicit.

content/browser/renderer_host/render_sandbox_host_linux.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/browser/renderer_host/render_sandbox_host_linux.h"
 
 #include <sys/socket.h>
 
 #include "base/memory/singleton.h"
 #include "base/posix/eintr_wrapper.h"
@@ skipping 52 matching lines @@
       DPLOG(ERROR) << "close";
     if (IGNORE_EINTR(close(pipefds[1])) < 0)
       DPLOG(ERROR) << "close";
 
     SandboxIPCProcess handler(child_lifeline_fd, browser_socket);
     handler.Run();
     _exit(0);
   }
 }
 
+bool RenderSandboxHostLinux::ShutdownIPCChannel() {
+  return IGNORE_EINTR(close(childs_lifeline_fd_)) == 0;
+}
+
 RenderSandboxHostLinux::~RenderSandboxHostLinux() {
   if (initialized_) {
+    if (!ShutdownIPCChannel())
+      LOG(ERROR) << "ShutdownIPCChannel failed";
     if (IGNORE_EINTR(close(renderer_socket_)) < 0)
       PLOG(ERROR) << "close";
-    if (IGNORE_EINTR(close(childs_lifeline_fd_)) < 0)
-      PLOG(ERROR) << "close";
   }
 }
 
 }  // namespace content