Remove oak windows and its flags.

ui/oak/oak_pretty_print.h

-// Copyright (c) 2012 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 UI_OAK_OAK_PRETTY_PRINT_H_
-#define UI_OAK_OAK_PRETTY_PRINT_H_
-
-#include "base/strings/string16.h"
-
-namespace gfx {
-class Insets;
-class Rect;
-}
-
-namespace oak {
-namespace internal {
-
-// Functions that return a string consisting of a prefix and the supplied value
-// converted to a pretty string representation.
-base::string16 PropertyWithInteger(const std::string& prefix, int value);
-base::string16 PropertyWithVoidStar(const std::string& prefix, void* ptr);
-base::string16 PropertyWithBool(const std::string& prefix, bool value);
-base::string16 PropertyWithBounds(const std::string& prefix,
-                                  const gfx::Rect& bounds);
-base::string16 PropertyWithInsets(const std::string& prefix,
-                                  const gfx::Insets& insets);
-
-}  // namespace internal
-}  // namespace oak
-
-#endif  // UI_OAK_OAK_PRETTY_PRINT_H_