Rename the shared impl files.

ppapi/shared_impl/instance_impl.cc

-// Copyright (c) 2011 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/shared_impl/instance_impl.h"
-
-#include "ppapi/c/pp_errors.h"
-#include "ppapi/c/ppb_input_event.h"
-
-namespace ppapi {
-
-InstanceImpl::~InstanceImpl() {
-}
-
-int32_t InstanceImpl::ValidateRequestInputEvents(bool is_filtering,
-                                                 uint32_t event_classes) {
-  // See if any bits are set we don't know about.
-  if (event_classes &
-      ~static_cast<uint32_t>(PP_INPUTEVENT_CLASS_MOUSE |
-                             PP_INPUTEVENT_CLASS_KEYBOARD |
-                             PP_INPUTEVENT_CLASS_WHEEL |
-                             PP_INPUTEVENT_CLASS_TOUCH |
-                             PP_INPUTEVENT_CLASS_IME))
-    return PP_ERROR_NOTSUPPORTED;
-
-  // Everything else is valid.
-  return PP_OK;
-}
-
-}  // namespace ppapi