Make ScopedGeneric uses slightly more consistent

util/win/scoped_local_alloc.cc

 // Copyright 2015 The Crashpad Authors. All rights reserved.
 //
 // 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.
 
 #include "util/win/scoped_local_alloc.h"
 
 #include "base/logging.h"
 
 namespace crashpad {
+namespace internal {
 
 // static
 void LocalAllocTraits::Free(HLOCAL memory) {
   PLOG_IF(ERROR, LocalFree(memory) != nullptr) << "LocalFree";
 }
 
+}  // namespace internal
 }  // namespace crashpad