Fix uses of /deep/ in trace viewer.

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

Index: tracing/tracing/ui/extras/chrome/cc/display_item_list_view.html
diff --git a/tracing/tracing/ui/extras/chrome/cc/display_item_list_view.html b/tracing/tracing/ui/extras/chrome/cc/display_item_list_view.html
index 18289c3fd1d881c1572a17513686d2f5774b097c..10cc54a271ee2270e9bb000dd5c13152ee90f17f 100644
--- a/tracing/tracing/ui/extras/chrome/cc/display_item_list_view.html
+++ b/tracing/tracing/ui/extras/chrome/cc/display_item_list_view.html
@@ -5,8 +5,6 @@ Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->
 
-<link rel="stylesheet" href="/tracing/ui/extras/chrome/cc/display_item_list_view.css">
-
 <link rel="import" href="/tracing/extras/chrome/cc/display_item_list.html">
 <link rel="import" href="/tracing/ui/analysis/generic_object_view.html">
 <link rel="import" href="/tracing/ui/analysis/object_snapshot_view.html">
@@ -28,8 +26,10 @@ tr.exportTo('tr.ui.e.chrome.cc', function() {
     __proto__: tr.ui.analysis.ObjectSnapshotView.prototype,
 
     decorate() {
-      Polymer.dom(this).classList.add(
-          'tr-ui-e-chrome-cc-display-item-list-view');
+      this.style.display = 'flex';
+      this.style.flexGrow = 1;
+      this.style.flexShrink = 1;
+      this.style.flexBasis = 'auto';
       this.displayItemDebugger_ = new tr.ui.e.chrome.cc.DisplayItemDebugger();
       Polymer.dom(this).appendChild(this.displayItemDebugger_);
     },