Refactor PPB_NetworkMonitor_Private interface to use CompletionCallback.

ppapi/proxy/resource_creation_proxy.h

Index: ppapi/proxy/resource_creation_proxy.h
diff --git a/ppapi/proxy/resource_creation_proxy.h b/ppapi/proxy/resource_creation_proxy.h
index edca902f16dd24ce953dd7e35b6716eef5cc1fd4..ebb533c42425d5bb2238c2f137938116ffd12d94 100644
--- a/ppapi/proxy/resource_creation_proxy.h
+++ b/ppapi/proxy/resource_creation_proxy.h
@@ -132,10 +132,7 @@ class ResourceCreationProxy : public InterfaceProxy,
   virtual PP_Resource CreateNetAddressFromNetAddressPrivate(
       PP_Instance instance,
       const PP_NetAddress_Private& private_addr) OVERRIDE;
-  virtual PP_Resource CreateNetworkMonitor(
-      PP_Instance instance,
-      PPB_NetworkMonitor_Callback callback,
-      void* user_data) OVERRIDE;
+  virtual PP_Resource CreateNetworkMonitor(PP_Instance instance) OVERRIDE;
   virtual PP_Resource CreatePrinting(PP_Instance) OVERRIDE;
   virtual PP_Resource CreateTCPServerSocketPrivate(
       PP_Instance instance) OVERRIDE;