Hold messages in message port service when a message port is

content/browser/message_port_provider.cc

Index: content/browser/message_port_provider.cc
diff --git a/content/browser/message_port_provider.cc b/content/browser/message_port_provider.cc
index 63de381756624de055e4720e7649c5fe41414798..f90ee7b60a8c97219c11eb06a2f47bb26e2301e3 100644
--- a/content/browser/message_port_provider.cc
+++ b/content/browser/message_port_provider.cc
@@ -80,6 +80,20 @@ void MessagePortProvider::ClosePort(int message_port_id) {
 }
 
 // static
+void MessagePortProvider::HoldMessages(int message_port_id) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  MessagePortService* msp = MessagePortService::GetInstance();
+  msp->HoldMessages(message_port_id);
+}
+
+// static
+void MessagePortProvider::ReleaseMessages(int message_port_id) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  MessagePortService* msp = MessagePortService::GetInstance();
+  msp->ReleaseMessages(message_port_id);
+}
+
+// static
 void MessagePortProvider::OnMessagePortDelegateClosing(
     MessagePortDelegate* delegate) {
   MessagePortService::GetInstance()->OnMessagePortDelegateClosing(delegate);