Delay destructing ChildDiscardableSharedMemoryManager

content/child/child_thread_impl.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/child/child_thread_impl.h"
 
 #include <signal.h>
 #include <string>
 #include <utility>
 
@@ skipping 500 matching lines @@
   channel_->ClearIPCTaskRunner();
   g_lazy_tls.Pointer()->Set(NULL);
 }
 
 void ChildThreadImpl::Shutdown() {
   // Delete objects that hold references to blink so derived classes can
   // safely shutdown blink in their Shutdown implementation.
   file_system_dispatcher_.reset();
   quota_dispatcher_.reset();
   WebFileSystemImpl::DeleteThreadSpecificInstance();
-  // ChildDiscardableSharedMemoryManager has to be destroyed while
-  // |thread_safe_sender_| and |message_loop_| are still valid.
+}
+
+void ChildThreadImpl::ShutdownDiscardableSharedMemoryManager() {
   discardable_shared_memory_manager_.reset();
 }
 
 void ChildThreadImpl::OnChannelConnected(int32_t peer_pid) {
   channel_connected_factory_.InvalidateWeakPtrs();
 }
 
 void ChildThreadImpl::OnChannelError() {
   on_channel_error_called_ = true;
   base::MessageLoop::current()->QuitWhenIdle();
@@ skipping 198 matching lines @@
 void ChildThreadImpl::EnsureConnected() {
   VLOG(0) << "ChildThreadImpl::EnsureConnected()";
   base::Process::Current().Terminate(0, false);
 }
 
 bool ChildThreadImpl::IsInBrowserProcess() const {
   return browser_process_io_runner_;
 }
 
 }  // namespace content