Use IPC::Sender and IPC::Listener in content.

content/worker/websharedworker_stub.h

Index: content/worker/websharedworker_stub.h
diff --git a/content/worker/websharedworker_stub.h b/content/worker/websharedworker_stub.h
index 7caf54580499b27dded9af673b1246457b4f5049..4bd3226dff1ee566f6879abb387344df8a4279f7 100644
--- a/content/worker/websharedworker_stub.h
+++ b/content/worker/websharedworker_stub.h
@@ -21,12 +21,12 @@ class SharedWorkerDevToolsAgent;
 
 // This class creates a WebSharedWorker, and translates incoming IPCs to the
 // appropriate WebSharedWorker APIs.
-class WebSharedWorkerStub : public IPC::Channel::Listener {
+class WebSharedWorkerStub : public IPC::Listener {
  public:
   WebSharedWorkerStub(const string16& name, int route_id,
                       const WorkerAppCacheInitInfo& appcache_init_info);
 
-  // IPC::Channel::Listener implementation.
+  // IPC::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void OnChannelError() OVERRIDE;