Enables the 'hotword not listening' icon in the search box.

ui/app_list/views/search_box_view.cc

 // 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.
 
 #include "ui/app_list/views/search_box_view.h"
 
 #include <algorithm>
 
 #include "grit/ui_resources.h"
 #include "ui/app_list/app_list_model.h"
 #include "ui/app_list/app_list_view_delegate.h"
 #include "ui/app_list/search_box_model.h"
+#include "ui/app_list/speech_ui_model.h"
 #include "ui/app_list/views/app_list_menu_views.h"
 #include "ui/app_list/views/contents_view.h"
 #include "ui/app_list/views/search_box_view_delegate.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/events/event.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/button/menu_button.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/textfield/textfield.h"
@@ skipping 40 matching lines @@
       IDR_APP_LIST_TOOLS_PRESSED));
   AddChildView(menu_button_);
 #endif
 
   search_box_->SetBorder(views::Border::NullBorder());
   search_box_->SetFontList(rb.GetFontList(ui::ResourceBundle::MediumFont));
   search_box_->set_placeholder_text_color(kHintTextColor);
   search_box_->set_controller(this);
   AddChildView(search_box_);
 
+  view_delegate_->GetSpeechUI()->AddObserver(this);
   ModelChanged();
 }
 
 SearchBoxView::~SearchBoxView() {
+  view_delegate_->GetSpeechUI()->RemoveObserver(this);
   model_->search_box()->RemoveObserver(this);
 }
 
 void SearchBoxView::ModelChanged() {
   if (model_)
     model_->search_box()->RemoveObserver(this);
 
   model_ = view_delegate_->GetModel();
   DCHECK(model_);
   model_->search_box()->AddObserver(this);
@@ skipping 116 matching lines @@
       menu_button_->GetBoundsInScreen().bottom_right() +
       gfx::Vector2d(kMenuXOffsetFromButton, kMenuYOffsetFromButton);
   menu_->RunMenuAt(menu_button_, menu_location);
 }
 
 void SearchBoxView::IconChanged() {
   icon_view_->SetImage(model_->search_box()->icon());
 }
 
 void SearchBoxView::SpeechRecognitionButtonPropChanged() {
-  const SearchBoxModel::ButtonProperty* speech_button_prop =
+  const SearchBoxModel::SpeechButtonProperty* speech_button_prop =
       model_->search_box()->speech_button();
   if (speech_button_prop) {
     if (!speech_button_) {
       speech_button_ = new views::ImageButton(this);
       AddChildView(speech_button_);
     }
-    speech_button_->SetImage(views::Button::STATE_NORMAL,
-                            &speech_button_prop->icon);
-    speech_button_->SetTooltipText(speech_button_prop->tooltip);
+
+    if (view_delegate_->GetSpeechUI()->state() ==
+        SPEECH_RECOGNITION_HOTWORD_LISTENING) {
+      speech_button_->SetImage(
+          views::Button::STATE_NORMAL, &speech_button_prop->on_icon);
+      speech_button_->SetTooltipText(speech_button_prop->on_tooltip);
+    } else {
+      speech_button_->SetImage(
+          views::Button::STATE_NORMAL, &speech_button_prop->off_icon);
+      speech_button_->SetTooltipText(speech_button_prop->off_tooltip);
+    }
   } else {
     if (speech_button_) {
       // Deleting a view will detach it from its parent.
       delete speech_button_;
       speech_button_ = NULL;
     }
   }
 }
 
 void SearchBoxView::HintTextChanged() {
   search_box_->set_placeholder_text(model_->search_box()->hint_text());
 }
 
 void SearchBoxView::SelectionModelChanged() {
   search_box_->SelectSelectionModel(model_->search_box()->selection_model());
 }
 
 void SearchBoxView::TextChanged() {
   search_box_->SetText(model_->search_box()->text());
   NotifyQueryChanged();
 }
 
+void SearchBoxView::OnSpeechRecognitionStateChanged(
+    SpeechRecognitionState new_state) {
+  SpeechRecognitionButtonPropChanged();
+  SchedulePaint();
+}
+
 }  // namespace app_list