Make chrome/browser/chromeos/accessibility compile on Athena with use_ash=0

ash/magnifier/magnifier_constants.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 ASH_MAGNIFIER_MAGNIFIER_CONSTANTS_H_
-#define ASH_MAGNIFIER_MAGNIFIER_CONSTANTS_H_
-
-namespace ash {
-
-// Note: Do not change these values; UMA and prefs depend on them.
-enum MagnifierType {
-  MAGNIFIER_FULL    = 1,
-  MAGNIFIER_PARTIAL = 2,
-};
-
-const int kMaxMagnifierType = 2;
-
-const MagnifierType kDefaultMagnifierType = MAGNIFIER_FULL;
-
-// Factor of magnification scale. For example, when this value is 1.189, scale
-// value will be changed x1.000, x1.189, x1.414, x1.681, x2.000, ...
-// Note: this value is 2.0 ^ (1 / 4).
-const float kMagnificationScaleFactor = 1.18920712f;
-
-}  // namespace ash
-
-#endif  // ASH_MAGNIFIER_MAGNIFIER_CONSTANTS_H_