A11y: Introduce High Contrast Mode and Screen Magnifier to ubar tray.

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>
 
+#include "ash/magnifier/magnifier_constants.h"
+
+class Browser;
+
 namespace content {
 class WebUI;
 }
 
 namespace chromeos {
 namespace accessibility {
 
-// Enable or disable spoken feedback. Enabling spoken feedback installs the
+// Enables or disables 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.
+// Enables or disables the high contrast mode for Chrome.
 void EnableHighContrast(bool enabled);
 
-enum ScreenMagnifierType {
-  MAGNIFIER_OFF,
-  MAGNIFIER_FULL,
-  MAGNIFIER_PARTIAL,
-};
+// Sets the type of screen magnifier, or disable it.
+void SetScreenMagnifier(ash::MagnifierType type);
 
-// Set the type of screen magnifier, or disable it.
-void SetScreenMagnifier(ScreenMagnifierType type);
-
-// Enable or disable the virtual keyboard.
+// Enables or disable the virtual keyboard.
 void EnableVirtualKeyboard(bool enabled);
 
 // Toggles whether Chrome OS spoken feedback is on or off. See docs for
 // EnableSpokenFeedback, above.
 void ToggleSpokenFeedback(content::WebUI* login_web_ui);
 
 // Speaks the specified string.
 void Speak(const std::string& utterance);
 
 // Returns true if spoken feedback is enabled, or false if not.
 bool IsSpokenFeedbackEnabled();
 
 // Returns true if High Contrast is enabled, or false if not.
 bool IsHighContrastEnabled();
 
 // Returns the current state of the screen magnifier.
-ScreenMagnifierType GetScreenMagnifierType();
+ash::MagnifierType GetMagnifierType();
 
-// Translates from a string to ScreenMagnifierType.
-ScreenMagnifierType ScreenMagnifierTypeFromName(const char type_name[]);
+// Translates from a string to MagnifierType.
+ash::MagnifierType MagnifierTypeFromName(const char type_name[]);
 
-// Translates from a ScreenMagnifierType to type string.
-const char* ScreenMagnifierNameFromType(ScreenMagnifierType type);
+// Translates from a MagnifierType to type string.
+const char* ScreenMagnifierNameFromType(ash::MagnifierType type);
 
-// Speak the given text if the accessibility pref is already set.
+// Speaks the given text if the accessibility pref is already set.
 void MaybeSpeak(const std::string& utterance);
 
+// Shows the accessibility help tab on the browser.
+void ShowAccessibilityHelp(Browser* browser);
+
 }  // namespace accessibility
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_ACCESSIBILITY_UTIL_H_