Implement flash menu and net connector resources using the API/thunk model.

ppapi/proxy/ppb_flash_net_connector_proxy.h

Index: ppapi/proxy/ppb_flash_net_connector_proxy.h
===================================================================
--- ppapi/proxy/ppb_flash_net_connector_proxy.h	(revision 89119)
+++ ppapi/proxy/ppb_flash_net_connector_proxy.h	(working copy)
@@ -27,10 +27,7 @@
 
   static const Info* GetInfo();
 
-  const PPB_Flash_NetConnector* ppb_flash_net_connector_target() const {
-    return reinterpret_cast<const PPB_Flash_NetConnector*>(
-        target_interface());
-  }
+  static PP_Resource CreateProxyResource(PP_Instance instance);
 
   // InterfaceProxy implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);