Fix SpeechUIModel lifetime issue in Chrome's AppListViewDelegate when switching profiles

ui/app_list/speech_ui_model.cc

 // Copyright 2013 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 "ui/app_list/speech_ui_model.h"
 
 #include <algorithm>
 
 namespace app_list {
 
 namespace {
 
 // The default sound level, just gotten from the developer device.
 const int16 kDefaultSoundLevel = 200;
 
 }  // namespace
 
-SpeechUIModel::SpeechUIModel(SpeechRecognitionState initial_state)
-    : state_(initial_state),
+SpeechUIModel::SpeechUIModel()
+    : is_final_(false),
+      sound_level_(0),
+      state_(app_list::SPEECH_RECOGNITION_OFF),
       minimum_sound_level_(kDefaultSoundLevel),
-      maximum_sound_level_(kDefaultSoundLevel) {}
+      maximum_sound_level_(kDefaultSoundLevel) {
+}
 
 SpeechUIModel::~SpeechUIModel() {}
 
 void SpeechUIModel::SetSpeechResult(const base::string16& result,
                                     bool is_final) {
   if (result_ == result && is_final_ == is_final)
     return;
 
   result_ = result;
   is_final_ = is_final;
@@ skipping 58 matching lines @@
 
 void SpeechUIModel::AddObserver(SpeechUIModelObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void SpeechUIModel::RemoveObserver(SpeechUIModelObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 }  // namespace app_list