Keep only base/extractor.[cc|h].

plugins/update/npapi/variant_utils.h

-// Copyright 2009 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// ========================================================================
-//
-// Converts between NPVariant and VARIANT types.
-// The following two-way conversions are supported:
-// NPVariantType_Void <-> VT_EMPTY
-// NPVariantType_Null <-> VT_NULL
-// NPVariantType_Bool <-> VT_BOOL
-// NPVariantType_Int32 <-> VT_I4
-// NPVariantType_Double <-> VT_R8
-// NPVariantType_String <-> VT_BSTR
-//
-// Furthermore, the following one-way conversions are supported:
-// VT_UI4 -> NPVariantType_Int32
-// VT_DISPATCH -> NPVariantType_Object (DispatchHost)
-// NPVariantType_Object -> VT_DISPATCH (NpFunctionHost)
-
-#ifndef OMAHA_PLUGINS_UPDATE_NPAPI_VARIANT_UTILS_H_
-#define OMAHA_PLUGINS_UPDATE_NPAPI_VARIANT_UTILS_H_
-
-#include <oaidl.h>
-#include "third_party/npapi/bindings/nphostapi.h"
-
-namespace omaha {
-
-void NPVariantToVariant(NPP npp,
-                        const NPVariant& source,
-                        VARIANT* destination);
-
-void VariantToNPVariant(NPP npp,
-                        const VARIANT& source,
-                        NPVariant* destination);
-
-}  // namespace omaha
-
-#endif  // OMAHA_PLUGINS_UPDATE_NPAPI_VARIANT_UTILS_H_