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

tracing/tracing/ui/extras/chrome/cc/layer_tree_quad_stack_view.html

Index: tracing/tracing/ui/extras/chrome/cc/layer_tree_quad_stack_view.html
diff --git a/tracing/tracing/ui/extras/chrome/cc/layer_tree_quad_stack_view.html b/tracing/tracing/ui/extras/chrome/cc/layer_tree_quad_stack_view.html
index 8975a61e18198bd31970fab9b139aeda816f3e98..a54deecabfca9dd67d2c4f919a8656ebf12865de 100644
--- a/tracing/tracing/ui/extras/chrome/cc/layer_tree_quad_stack_view.html
+++ b/tracing/tracing/ui/extras/chrome/cc/layer_tree_quad_stack_view.html
@@ -1152,17 +1152,17 @@ tr.exportTo('tr.ui.e.chrome.cc', function() {
       var lthi = this.layerTreeImpl_.layerTreeHostImpl;
       var renderProcess = lthi.objectInstance.parent;
       var tasks = [];
-      renderProcess.iterateAllEvents(function(event) {
+      for (var event of renderProcess.getDescendantEvents()) {
         if (!(event instanceof tr.model.Slice))
-          return;
+          continue;
 
         var tile = tr.e.cc.getTileFromRasterTaskSlice(event);
         if (tile === undefined)
-          return false;
+          continue;
 
         if (tile.containingSnapshot == lthi)
           tasks.push(event);
-      }, this);
+      }
       return tasks;
     },