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

base/scoped_ptr_address.h

-// Copyright 2007-2009 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.
-// ========================================================================
-
-// Helper functions to enable a useful pattern of using scoped pointers in
-// which the ownership of the memory is transferred out to an empty
-// scoped_ptr or scoped_array.
-//
-// The usage pattern is as follows:
-//    void foo(Bar** b);
-//
-//    scoped_ptr<B> p;
-//    foo(address(p));
-//
-// To receive the ownwership of the resource the scoped pointer must be
-// empty, otherwise it will leak.
-//
-// As an implementation detail, the scoped pointers in "base/scoped_ptr.h" do
-// not offer support for this idiom. The code below may break if the
-// implementation of the scoped_ptr changes. The code works with the vast
-// majority of the scoped_ptr implementations though.
-//
-// TODO(omaha): add unit tests.
-
-#ifndef OMAHA_COMMON_SCOPED_PTR_ADDRESS__
-#define OMAHA_COMMON_SCOPED_PTR_ADDRESS__
-
-#include "base/basictypes.h"
-#include "base/scoped_ptr.h"
-#include "omaha/base/debug.h"
-
-template <typename T>
-inline T** address(const scoped_ptr<T>& t) {
-  COMPILE_ASSERT(sizeof(T*) == sizeof(scoped_ptr<T>), types_do_not_match);
-  ASSERT1(!t.get());
-  return reinterpret_cast<T**>(&const_cast<scoped_ptr<T>&>(t));
-}
-
-template <typename T>
-inline T** address(const scoped_array<T>& t) {
-  COMPILE_ASSERT(sizeof(T*) == sizeof(scoped_ptr<T>), types_do_not_match);
-  ASSERT1(!t.get());
-  return reinterpret_cast<T**>(&const_cast<scoped_array<T>&>(t));
-}
-
-#endif // OMAHA_COMMON_SCOPED_PTR_ADDRESS__
-