Wrap the p2p transport API in a compile time flag.

webkit/plugins/ppapi/plugin_module.cc

Index: webkit/plugins/ppapi/plugin_module.cc
diff --git a/webkit/plugins/ppapi/plugin_module.cc b/webkit/plugins/ppapi/plugin_module.cc
index 7e8dc4a551ebf1a2e095c2efe8473acb3077faaa..1d79dabe48d96d9bb794d2e6bd1a9dcb366244d9 100644
--- a/webkit/plugins/ppapi/plugin_module.cc
+++ b/webkit/plugins/ppapi/plugin_module.cc
@@ -288,8 +288,12 @@ const void* GetInterface(const char* name) {
     return PPB_Proxy_Impl::GetInterface();
   if (strcmp(name, PPB_SCROLLBAR_DEV_INTERFACE) == 0)
     return PPB_Scrollbar_Impl::GetInterface();
+
+#if defined(ENABLE_PPAPI_TRANSPORT)
   if (strcmp(name, PPB_TRANSPORT_DEV_INTERFACE) == 0)
     return PPB_Transport_Impl::GetInterface();
+#endif
+
   if (strcmp(name, PPB_URLLOADER_INTERFACE) == 0)
     return PPB_URLLoader_Impl::GetInterface();
   if (strcmp(name, PPB_URLLOADERTRUSTED_INTERFACE) == 0)