Include the document URL in the load_time_data.js expectation failures.

BUG=396752
R=estade@chromium.org

Review URL: https://codereview.chromium.org/414753004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@285064 0039d316-1c4b-4281-b951-d872f2087c98

ui/webui/resources/js/load_time_data.js

@@ -118,8 +118,10 @@ var loadTimeData;
    * @param {string} message The message to display if the check fails.
    */
   function expect(condition, message) {
-    if (!condition)
-      console.error(message);
+    if (!condition) {
+      console.error('Unexpected condition on ' + document.location.href + ': ' +
+                    message);
+    }
   }
 
   /**