Revert 220500 "Adds the contextMessage field to notifications."

trunk/src/chrome/browser/extensions/api/notifications/notifications_api.cc

Index: trunk/src/chrome/browser/extensions/api/notifications/notifications_api.cc
===================================================================
--- trunk/src/chrome/browser/extensions/api/notifications/notifications_api.cc	(revision 220506)
+++ trunk/src/chrome/browser/extensions/api/notifications/notifications_api.cc	(working copy)
@@ -284,9 +284,6 @@
           UTF8ToUTF16(*options->expanded_message);
     }
 
-    if (options->context_message)
-      optional_fields.context_message = UTF8ToUTF16(*options->context_message);
-
     bool has_image = NotificationBitmapToGfxImage(options->image_bitmap.get(),
                                                   &optional_fields.image);
     // We should have an image if and only if the type is an image type.
@@ -387,9 +384,6 @@
       }
     }
 
-    if (options->context_message)
-      notification->set_context_message(UTF8ToUTF16(*options->context_message));
-
     if (options->expanded_message) {
       notification->set_expanded_message(
           UTF8ToUTF16(*options->expanded_message));