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

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index e5b21b74fd268824e5e8b57afba9bcd960fa49ea..df71a153118f8cf12147574874e9fcf7d09b0fdf 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -15391,6 +15391,12 @@ Do you accept?
     <message name="IDS_APP_LIST_CONTACT_VIDEO_TOOLTIP" desc="Tooltip text for the 'video' icon displayed next to a contact search result.">
       Start Hangout
     </message>
+    <message name="IDS_APP_LIST_START_SPEECH_RECOGNITION" desc="Tooltip text for the button to start the speech recognition.">
+      Start speech recognition
+    </message>
+    <message name="IDS_APP_LIST_STOP_SPEECH_RECOGNITION" desc="Tooltip text for the button to stop the speech recognition.">
+      Stop speech recognition
+    </message>
     <if expr="not pp_ifdef('use_titlecase')">
       <message name="IDS_APP_LIST_CONTEXT_MENU_NEW_TAB" desc="Title text for the 'open new' context menu item of an app list item configured to open in a tab">
         New tab