Introducing the basic functionality to the speech input experimental API.

chrome/common/chrome_notification_types.h

Index: chrome/common/chrome_notification_types.h
diff --git a/chrome/common/chrome_notification_types.h b/chrome/common/chrome_notification_types.h
index 5fef7e7d5a5fdd5bf7a0d281e9e92ef97403252d..a29d29e584de93105c76328b26e0f33e15eae6b9 100644
--- a/chrome/common/chrome_notification_types.h
+++ b/chrome/common/chrome_notification_types.h
@@ -505,6 +505,15 @@ enum NotificationType {
   // object.
   NOTIFICATION_EXTENSION_PREF_CHANGED,
 
+  // Sent when a recording session for speech input has started.
+  NOTIFICATION_EXTENSION_SPEECH_INPUT_RECORDING_STARTED,
+
+  // Sent when a recording session for speech input has stopped.
+  NOTIFICATION_EXTENSION_SPEECH_INPUT_RECORDING_STOPPED,
+
+  // Sent when a recording session for speech input has failed.
+  NOTIFICATION_EXTENSION_SPEECH_INPUT_FAILED,
+
   // Sent when the extension updater starts checking for updates to installed
   // extensions. The source is a Profile, and there are no details.
   NOTIFICATION_EXTENSION_UPDATING_STARTED,