[NaCl SDK] Add nacl_io and sdk_util namespaces.

native_client_sdk/src/libraries/ppapi_simple/ps_instance.h

 // Copyright (c) 2013 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.
 
 #ifndef PPAPI_SIMPLE_PS_INSTANCE_H_
 #define PPAPI_SIMPLE_PS_INSTANCE_H_
 
 #include <stdarg.h>
 #include <map>
 
@@ skipping 106 matching lines @@
   // launching the 'ppapi_main' thread.
   virtual bool ProcessProperties();
 
  private:
   static void* MainThreadThunk(void *start_info);
 
  protected:
   pp::MessageLoop* main_loop_;
 
   PropertyMap_t properties_;
-  ThreadSafeQueue<PSEvent> event_queue_;
+  sdk_util::ThreadSafeQueue<PSEvent> event_queue_;
   uint32_t events_enabled_;
   Verbosity verbosity_;
   int fd_tty_;
 
   PSMainFunc_t main_cb_;
 
   const PPB_Core* ppb_core_;
   const PPB_Var* ppb_var_;
   const PPB_View* ppb_view_;
-
-  friend class PSGraphics3DClient;
-  friend class PSMouseLock;
 };
 
 #endif  // PPAPI_MAIN_PS_INSTANCE_H_