Handle undefined TimelineAsyncSlice.subSlices in about:tracing.

BUG=123113 TEST=timeline_track_test.html Review URL: http://codereview.chromium.org/10008088 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@132062 0039d316-1c4b-4281-b951-d872f2087c98
Denger-Network · Apr 12, 2012 · d78e2b2 · d78e2b2
1 parent b7cc532
commit d78e2b2
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/chrome/browser/resources/tracing/timeline_model.js b/chrome/browser/resources/tracing/timeline_model.js
@@ -546,9 +546,11 @@ cr.define('tracing', function() {
         }
         if (!found) {
           var subRow = [];
-          for (var k = 0; k < slice.subSlices.length; k++)
-            subRow.push(slice.subSlices[k]);
-          subRows.push(subRow);
+          if (slice.subSlices !== undefined) {
+            for (var k = 0; k < slice.subSlices.length; k++)
+              subRow.push(slice.subSlices[k]);
+            subRows.push(subRow);
+          }
         }
       }
       this.subRows_ = subRows;