Add support for omnibox.onInputStarted and onInputCancelled.

chrome/common/notification_type.h

Index: chrome/common/notification_type.h
diff --git a/chrome/common/notification_type.h b/chrome/common/notification_type.h
index 3c96a1a952ed9a6985705f7e471ba18e4c7f33f5..4fe4eff7243f06850299bb0673c8c33464a7dade 100644
--- a/chrome/common/notification_type.h
+++ b/chrome/common/notification_type.h
@@ -866,10 +866,14 @@ class NotificationType {
     EXTENSION_BOOKMARKS_API_INVOKED,
 
     // Sent when an omnibox extension has sent back omnibox suggestions. The
-    // source is the profile, and the details are a
-    // std::pair<int suggest_id, ListValue suggestions_array>
+    // source is the profile, and the details are an ExtensionOmniboxSuggestions
+    // object.
     EXTENSION_OMNIBOX_SUGGESTIONS_READY,
 
+    // Sent when the user accepts the input in an extension omnibox keyword
+    // session. The source is the profile.
+    EXTENSION_OMNIBOX_INPUT_ENTERED,
+
     // The source is the extension object that changed. Details is a bool*
     // with the new visibility.
     EXTENSION_APP_TOOLBAR_VISIBILITY_CHANGED,