First round of dead file removal

experimental/c_salt/npapi/npn_bridge.cc

-// Copyright 2010 The Ginsu 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 <assert.h>
-#include <nacl/npapi_extensions.h>
-#include <nacl/npupp.h>
-
-// PINPAPI extensions.  These get filled in when NPP_New is called.
-static NPExtensions* kPINPAPIExtensions = NULL;
-
-void InitializePepperExtensions(NPP instance) {
-  // Grab the PINPAPI extensions.
-  NPN_GetValue(instance, NPNVPepperExtensions,
-               reinterpret_cast<void*>(&kPINPAPIExtensions));
-  assert(NULL != kPINPAPIExtensions);
-}
-
-// These are PINPAPI extensions.
-NPDevice* NPN_AcquireDevice(NPP instance, NPDeviceID device) {
-  return kPINPAPIExtensions ?
-      kPINPAPIExtensions->acquireDevice(instance, device) : NULL;
-}
-