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

chrome/browser/chromeos/login/wizard_accessibility_helper.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_helper.h"
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/accessibility_util.h"
@@ skipping 74 matching lines @@
 
 bool WizardAccessibilityHelper::IsAccessibilityEnabled() {
   return g_browser_process &&
       g_browser_process->local_state()->GetBoolean(
       prefs::kAccessibilityEnabled);
 }
 
 void WizardAccessibilityHelper::MaybeSpeak(const char* str, bool queue,
     bool interruptible) {
   if (IsAccessibilityEnabled()) {
-    accessibility::Speak(str, queue, interruptible);
+    // Note: queue and interruptible are no longer supported, but
+    // that shouldn't matter because the whole views-based wizard
+    // is obsolete and should be deleted soon.
+    accessibility::Speak(str);
   }
 }
 
 void WizardAccessibilityHelper::ToggleAccessibility() {
   if (!IsAccessibilityEnabled()) {
     VLOG(1) << "Enabling accessibility.";
     if (!registered_notifications_)
       RegisterNotifications();
     SetAccessibilityEnabled(true);
   } else {
     SetAccessibilityEnabled(false);
     if (registered_notifications_)
       UnregisterNotifications();
   }
 }
 
 void WizardAccessibilityHelper::SetAccessibilityEnabled(bool enabled) {
   accessibility::EnableAccessibility(enabled, NULL);
 }
 
 }  // namespace chromeos