Add the partial screen magnifier to Chrome OS.

chrome/common/pref_names.cc

 // 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.
 
 #include "chrome/common/pref_names.h"
 
 #include "base/basictypes.h"
 
 namespace prefs {
 
@@ skipping 711 matching lines @@
 // A integer pref which determines key repeat interval (in ms).
 const char kLanguageXkbAutoRepeatInterval[] =
     "settings.language.xkb_auto_repeat_interval_r2";
 // "_r2" suffixes are added to the three prefs above when we change the
 // preferences not user-configurable, not to sync them with cloud.
 
 // A boolean pref which determines whether spoken feedback is enabled.
 const char kSpokenFeedbackEnabled[] = "settings.accessibility";
 // A boolean pref which determines whether high conrast is enabled.
 const char kHighContrastEnabled[] = "settings.a11y.high_contrast_enabled";
-// A boolean pref which determines whether screen magnifier is enabled.
-const char kScreenMagnifierEnabled[] = "settings.a11y.screen_magnifier";
 // A double pref which determines a zooming scale of the screen magnifier.
 const char kScreenMagnifierScale[] = "settings.a11y.screen_magnifier_scale";
+// A string pref which determines what type of screen magnifier is enabled.
+const char kScreenMagnifierType[] = "settings.a11y.screen_magnifier_type";
 // A boolean pref which determines whether virtual keyboard is enabled.
 // TODO(hashimoto): Remove this pref.
 const char kVirtualKeyboardEnabled[] = "settings.a11y.virtual_keyboard";
 
 // A boolean pref which turns on Advanced Filesystem
 // (USB support, SD card, etc).
 const char kLabsAdvancedFilesystemEnabled[] =
     "settings.labs.advanced_filesystem";
 
 // A boolean pref which turns on the mediaplayer.
@@ skipping 1391 matching lines @@
 // Tracks the time of the last shown warning. Used to reset
 // |network_profile.warnings_left| after a silence period.
 const char kNetworkProfileLastWarningTime[] =
     "network_profile.last_warning_time";
 
 // 64-bit serialization of the time last policy usage statistics were collected
 // by UMA_HISTOGRAM_ENUMERATION.
 const char kLastPolicyStatisticsUpdate[] = "policy.last_statistics_update";
 
 }  // namespace prefs