Move scoped_temp_dir and scoped_native_library back from base/memory to base.

base/memory/scoped_native_library.h

-// 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.
-
-#ifndef BASE_MEMORY_SCOPED_NATIVE_LIBRARY_H_
-#define BASE_MEMORY_SCOPED_NATIVE_LIBRARY_H_
-#pragma once
-
-#include "base/base_api.h"
-#include "base/native_library.h"
-
-class FilePath;
-
-namespace base {
-
-// A class which encapsulates a base::NativeLibrary object available only in a
-// scope.
-// This class automatically unloads the loaded library in its destructor.
-class BASE_API ScopedNativeLibrary {
- public:
-  // Initializes with a NULL library.
-  ScopedNativeLibrary();
-
-  // Takes ownership of the given library handle.
-  explicit ScopedNativeLibrary(NativeLibrary library);
-
-  // Opens the given library and manages its lifetime.
-  explicit ScopedNativeLibrary(const FilePath& library_path);
-
-  ~ScopedNativeLibrary();
-
-  // Returns true if there's a valid library loaded.
-  bool is_valid() const { return !!library_; }
-
-  void* GetFunctionPointer(const char* function_name) const;
-
-  // Takes ownership of the given library handle. Any existing handle will
-  // be freed.
-  void Reset(NativeLibrary library);
-
-  // Returns the native library handle and removes it from this object. The
-  // caller must manage the lifetime of the handle.
-  NativeLibrary Release();
-
- private:
-  NativeLibrary library_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedNativeLibrary);
-};
-
-}  // namespace base
-
-#endif  // BASE_MEMORY_SCOPED_NATIVE_LIBRARY_H_