Adds the speech recognition button to the app-list searchbox.

ui/app_list/search_box_model.cc

Index: ui/app_list/search_box_model.cc
diff --git a/ui/app_list/search_box_model.cc b/ui/app_list/search_box_model.cc
index 5130e501cc882ccc2c252184490a0f260130da80..d84b33c708e3f3c41efa8af451d28ef44033ba7b 100644
--- a/ui/app_list/search_box_model.cc
+++ b/ui/app_list/search_box_model.cc
@@ -9,6 +9,20 @@
 
 namespace app_list {
 
+SearchBoxModel::ToggleButtonProperty::ToggleButtonProperty(
+    const gfx::ImageSkia& icon,
+    const gfx::ImageSkia& toggled_icon,
+    const base::string16& tooltip,
+    const base::string16& toggled_tooltip)
+    : icon(icon),
+      toggled_icon(toggled_icon),
+      tooltip(tooltip),
+      toggled_tooltip(toggled_tooltip) {
+}
+
+SearchBoxModel::ToggleButtonProperty::~ToggleButtonProperty() {
+}
+
 SearchBoxModel::SearchBoxModel() {
 }
 
@@ -20,6 +34,20 @@ void SearchBoxModel::SetIcon(const gfx::ImageSkia& icon) {
   FOR_EACH_OBSERVER(SearchBoxModelObserver, observers_, IconChanged());
 }
 
+void SearchBoxModel::SetSpeechRecognitionButton(
+    scoped_ptr<SearchBoxModel::ToggleButtonProperty> speech_button) {
+  speech_button_ = speech_button.Pass();
+  FOR_EACH_OBSERVER(SearchBoxModelObserver,
+                    observers_,
+                    SpeechRecognitionButtonPropChanged());
+}
+
+void SearchBoxModel::SetSpeechRecognitionButtonState(bool toggled) {
+  FOR_EACH_OBSERVER(SearchBoxModelObserver,
+                    observers_,
+                    SetSpeechRecognitionButtonState(toggled));
+}
+
 void SearchBoxModel::SetHintText(const base::string16& hint_text) {
   if (hint_text_ == hint_text)
     return;