ppapi NaCl trusted plugin: Rename interface because Win build breaks on it.

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

Index: ppapi/native_client/src/trusted/plugin/pnacl_translate_thread.cc
diff --git a/ppapi/native_client/src/trusted/plugin/pnacl_translate_thread.cc b/ppapi/native_client/src/trusted/plugin/pnacl_translate_thread.cc
index 06d31e802c12acadd49edbd772e8904404f296a6..65ab9bec2eb322fd4f1a3b57702c8fa12111dd88 100644
--- a/ppapi/native_client/src/trusted/plugin/pnacl_translate_thread.cc
+++ b/ppapi/native_client/src/trusted/plugin/pnacl_translate_thread.cc
@@ -119,9 +119,9 @@ void PnaclTranslateThread::TranslateFailed(const nacl::string& error_string) {
 // called on the translation thread before any RPCs are called, and called
 // again with NULL before the object is destroyed.
 void PnaclTranslateThread::RegisterReverseInterface(
-    PluginReverseInterface *interface) {
+    PluginReverseInterface *iface) {
   nacl::MutexLocker ml(&subprocess_mu_);
-  current_rev_interface_ = interface;
+  current_rev_interface_ = iface;
 }