Hide knowledge of webkit::ppapi::Plugin from chrome. This is part of moving ppapi implementation fr…

ppapi/native_client/src/trusted/plugin/sel_ldr_launcher_chrome.cc

Index: ppapi/native_client/src/trusted/plugin/sel_ldr_launcher_chrome.cc
===================================================================
--- ppapi/native_client/src/trusted/plugin/sel_ldr_launcher_chrome.cc	(revision 213146)
+++ ppapi/native_client/src/trusted/plugin/sel_ldr_launcher_chrome.cc	(working copy)
@@ -38,7 +38,7 @@
                           PP_FromBool(enable_dyncode_syscalls),
                           PP_FromBool(enable_exception_handling),
                           &channel_,
-                          &var_error_message) != PP_NACL_OK) {
+                          &var_error_message) != PP_EXTERNAL_PLUGIN_OK) {
     pp::Var var_error_message_cpp(pp::PASS_REF, var_error_message);
     if (var_error_message_cpp.is_string()) {
       *error_message = var_error_message_cpp.AsString();