Move Speak() in accessibility_utils, speak enable and disable strings when

chrome/browser/chromeos/accessibility_util.h

 // Copyright (c) 2011 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_UTIL_H_
 #define CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_UTIL_H_
 #pragma once
 
 class WebUI;
 
 namespace chromeos {
 namespace accessibility {
 
 // Enable or disable accessibility. Enabling accessibility 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 EnableAccessibility(bool enabled, WebUI* login_web_ui);
 
 // Toggles whether Chrome OS accessibility is on or off. See docs for
 // EnableAccessibility, above.
 void ToggleAccessibility(WebUI* login_web_ui);
 
+// Speaks the specified string.
+void Speak(const char* speak_str, bool queue, bool interruptible);
+
 }  // namespace accessibility
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_UTIL_H_