Change call-sites in trace viewer to use generators instead of iteration functions.

tracing/tracing/model/counter.html

Index: tracing/tracing/model/counter.html
diff --git a/tracing/tracing/model/counter.html b/tracing/tracing/model/counter.html
index 413c8cad1403eeebe4483d7a8296420ad085c3b4..74c0991c91f348fa54ec86fddffa628ee89c9675 100644
--- a/tracing/tracing/model/counter.html
+++ b/tracing/tracing/model/counter.html
@@ -56,11 +56,7 @@ tr.exportTo('tr.model', function() {
       return this.name_;
     },
 
-    findTopmostSlicesInThisContainer: function(eventPredicate, callback,
-                                               opt_this) {
-    },
-
-    childEvents: function*(eventTypePredicate, opt_this) {
+    childEvents: function*() {
     },
 
     childEventContainers: function*() {