[polymer] Switches .appendChild() to Polymer.dom()...appendChild()

tracing/tracing/ui/analysis/single_object_snapshot_sub_view.html

Index: tracing/tracing/ui/analysis/single_object_snapshot_sub_view.html
diff --git a/tracing/tracing/ui/analysis/single_object_snapshot_sub_view.html b/tracing/tracing/ui/analysis/single_object_snapshot_sub_view.html
index cb1e0fc4b945d0875990d766325f07a2e9511912..b2809bbbfe9298e710bc4323090f10ac6c0c157b 100644
--- a/tracing/tracing/ui/analysis/single_object_snapshot_sub_view.html
+++ b/tracing/tracing/ui/analysis/single_object_snapshot_sub_view.html
@@ -97,16 +97,16 @@ Polymer({
 
     var titleEl = document.createElement('div');
     titleEl.classList.add('title');
-    titleEl.appendChild(document.createTextNode('Snapshot of '));
+    Polymer.dom(titleEl).appendChild(document.createTextNode('Snapshot of '));
     Polymer.dom(this).appendChild(titleEl);
 
     var instanceLinkEl = document.createElement('tr-ui-a-analysis-link');
     instanceLinkEl.selection = new tr.model.EventSet(instance);
-    titleEl.appendChild(instanceLinkEl);
+    Polymer.dom(titleEl).appendChild(instanceLinkEl);
 
-    titleEl.appendChild(document.createTextNode(' @ '));
+    Polymer.dom(titleEl).appendChild(document.createTextNode(' @ '));
 
-    titleEl.appendChild(tr.v.ui.createScalarSpan(snapshot.ts, {
+    Polymer.dom(titleEl).appendChild(tr.v.ui.createScalarSpan(snapshot.ts, {
       unit: tr.v.Unit.byName.timeStampInMs,
       ownerDocument: this.ownerDocument
     }));
@@ -115,19 +115,19 @@ Polymer({
     Polymer.dom(this).appendChild(tableEl);
 
     var rowEl = document.createElement('tr');
-    tableEl.appendChild(rowEl);
+    Polymer.dom(tableEl).appendChild(rowEl);
 
     var labelEl = document.createElement('td');
     labelEl.textContent = 'args:';
-    rowEl.appendChild(labelEl);
+    Polymer.dom(rowEl).appendChild(labelEl);
 
     var argsEl = document.createElement('td');
     argsEl.id = 'args';
-    rowEl.appendChild(argsEl);
+    Polymer.dom(rowEl).appendChild(argsEl);
 
     var objectViewEl = document.createElement('tr-ui-a-generic-object-view');
     objectViewEl.object = snapshot.args;
-    argsEl.appendChild(objectViewEl);
+    Polymer.dom(rgsEl).appendChild(objectViewEl);
   }
 });
 </script>