Fix race condition in utility process clients

content/browser/utility_process_host.cc

Index: content/browser/utility_process_host.cc
diff --git a/content/browser/utility_process_host.cc b/content/browser/utility_process_host.cc
index 5f2e5a2dd28d22fb12ef789cc672e11e4f27708b..ec56c736e50d496341a5d7a3175dcf11e3a87333 100644
--- a/content/browser/utility_process_host.cc
+++ b/content/browser/utility_process_host.cc
@@ -53,6 +53,7 @@ UtilityProcessHost::UtilityProcessHost(Client* client,
 }
 
 UtilityProcessHost::~UtilityProcessHost() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK(!is_batch_mode_);
 }
 
@@ -158,7 +159,7 @@ bool UtilityProcessHost::OnMessageReceived(const IPC::Message& message) {
   return true;
 }
 
-void UtilityProcessHost::OnProcessCrashed(int exit_code) {
+void UtilityProcessHost::OnProcessCrashedOrWasKilled(int exit_code) {
   BrowserThread::PostTask(
       client_thread_id_, FROM_HERE,
       base::Bind(&Client::OnProcessCrashed, client_.get(), exit_code));