Don't start speech synthesis until after the audio mixer is initialized.

chrome/browser/chromeos/login/wizard_accessibility_handler.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/wizard_accessibility_handler.h"
 
 #include <algorithm>
 
 #include "base/i18n/char_iterator.h"
 #include "base/logging.h"
@@ skipping 90 matching lines @@
 
 void WizardAccessibilityHandler::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   const AccessibilityControlInfo *control_info =
       content::Details<const AccessibilityControlInfo>(details).ptr();
   std::string description;
   EarconType earcon = NO_EARCON;
   DescribeAccessibilityEvent(type, control_info, &description, &earcon);
-  accessibility::Speak(description.c_str(), false, true);
+  accessibility::Speak(description.c_str());
 }
 
 void WizardAccessibilityHandler::DescribeAccessibilityEvent(
     int event_type,
     const AccessibilityControlInfo* control_info,
     std::string* out_spoken_description,
     EarconType* out_earcon) {
   *out_spoken_description = std::string();
   *out_earcon = NO_EARCON;
 
@@ skipping 296 matching lines @@
   } else if (!inserted.empty()) {
     // Speak inserted text.
     AppendUtterance(inserted, out_spoken_description);
   } else if (!deleted.empty()) {
     // Speak deleted text.
     AppendUtterance(deleted, out_spoken_description);
   }
 }
 
 }  // namespace chromeos