[NaCl SDK] Switch ppapi_simple to C library

native_client_sdk/src/libraries/ppapi_simple/ps.c

+/* Copyright 2015 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file. */
+
+#include "ppapi_simple/ps.h"
+
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/c/ppb.h"
+
+/* Defined in ps_instance.c */
+extern PP_Instance g_ps_instance;
+extern PPB_GetInterface g_ps_get_interface;
+
+PP_Instance PSGetInstanceId(void) {
+  return g_ps_instance;
+}
+
+const void* PSGetInterface(const char *name) {
+  return g_ps_get_interface(name);
+}