[gnome-documents] documents: Warn that DocCommon implementations must override canTrash

[Debarshi Ray <debarshir src gnome org>]

commit 6ad46e55572b28da3a4e27ce21bfccb2a7e5310d
Author: Debarshi Ray <debarshir gnome org>
Date:   Tue Feb 25 12:33:27 2014 +0100

    documents: Warn that DocCommon implementations must override canTrash
    
    https://bugzilla.gnome.org/show_bug.cgi?id=725128

 src/documents.js |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/documents.js b/src/documents.js
index e535c60..0c46dbb 100644
--- a/src/documents.js
+++ b/src/documents.js
@@ -358,6 +358,10 @@ const DocCommon = new Lang.Class({
         log('Error: DocCommon implementations must override canShare');
     },
 
+    canTrash: function(callback) {
+        log('Error: DocCommon implementations must override canTrash');
+    },
+
     createThumbnail: function(callback) {
         log('Error: DocCommon implementations must override createThumbnail');
     },