Decouple IPC::MessageFilter from IPC::Channel

content/browser/message_port_message_filter.h

Index: content/browser/message_port_message_filter.h
diff --git a/content/browser/message_port_message_filter.h b/content/browser/message_port_message_filter.h
index 64d07d6c328b3e3e5430dcecb19d6aca0759424b..54eddf9073edae5c603ae8caad93d6f829def4a8 100644
--- a/content/browser/message_port_message_filter.h
+++ b/content/browser/message_port_message_filter.h
@@ -22,7 +22,7 @@ class CONTENT_EXPORT MessagePortMessageFilter : public BrowserMessageFilter {
   explicit MessagePortMessageFilter(const NextRoutingIDCallback& callback);
 
   // BrowserMessageFilter implementation.
-  virtual void OnChannelClosing() OVERRIDE;
+  virtual void OnSenderClosing() OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void OnDestruct() const OVERRIDE;
 
@@ -45,7 +45,7 @@ class CONTENT_EXPORT MessagePortMessageFilter : public BrowserMessageFilter {
   // Message handlers.
   void OnCreateMessagePort(int* route_id, int* message_port_id);
 
-  // This is guaranteed to be valid until OnChannelClosing is invoked, and it's
+  // This is guaranteed to be valid until OnSenderClosing is invoked, and it's
   // not used after.
   NextRoutingIDCallback next_routing_id_;