Full Screen Magnifier: Add MagnificationManager

chrome/browser/chromeos/accessibility/accessibility_util.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 CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_ACCESSIBILITY_UTIL_H_
 #define CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_ACCESSIBILITY_UTIL_H_
 
 #include <string>
 
 namespace content {
 class WebUI;
 }
 
 namespace chromeos {
 namespace accessibility {
 
 // Enable or disable spoken feedback. Enabling spoken feedback installs the
 // ChromeVox component extension.  If this is being called in a login/oobe
 // login screen, pass the WebUI object in login_web_ui so that ChromeVox
 // can be injected directly into that screen, otherwise it should be NULL.
 void EnableSpokenFeedback(bool enabled, content::WebUI* login_web_ui);
 
 // Enable or disable the high contrast mode for Chrome.
 void EnableHighContrast(bool enabled);
 
+// String constants of the magnifier types.
+extern const char kScreenMagnifierOff[];
+extern const char kScreenMagnifierFull[];
+extern const char kScreenMagnifierPartial[];
+
 enum ScreenMagnifierType {
   MAGNIFIER_OFF,
   MAGNIFIER_FULL,
   MAGNIFIER_PARTIAL,
 };
 
 // Set the type of screen magnifier, or disable it.
 void SetScreenMagnifier(ScreenMagnifierType type);
 
 // Enable or disable the virtual keyboard.
@@ skipping 21 matching lines @@
 // Translates from a ScreenMagnifierType to type string.
 const char* ScreenMagnifierNameFromType(ScreenMagnifierType type);
 
 // Speak the given text if the accessibility pref is already set.
 void MaybeSpeak(const std::string& utterance);
 
 }  // namespace accessibility
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_ACCESSIBILITY_UTIL_H_