Change all == to === and != to !== in trace viewer.

tracing/tracing/ui/extras/highlighter/vsync_highlighter.html

Index: tracing/tracing/ui/extras/highlighter/vsync_highlighter.html
diff --git a/tracing/tracing/ui/extras/highlighter/vsync_highlighter.html b/tracing/tracing/ui/extras/highlighter/vsync_highlighter.html
index b804717a76a099a075dd12407ca2efb3b91fe409..a36021dd7b3eaed712e867d628b9acf1c23733f9 100644
--- a/tracing/tracing/ui/extras/highlighter/vsync_highlighter.html
+++ b/tracing/tracing/ui/extras/highlighter/vsync_highlighter.html
@@ -5,9 +5,9 @@ Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->
 
-<link rel="import" href="/tracing/ui/tracks/highlighter.html">
 <link rel="import" href="/tracing/ui/timeline_track_view.html">
 <link rel="import" href="/tracing/ui/timeline_viewport.html">
+<link rel="import" href="/tracing/ui/tracks/highlighter.html">
 <link rel="import" href="/tracing/ui/tracks/model_track.html">
 
 <script>
@@ -81,7 +81,7 @@ tr.exportTo('tr.ui.e.highlighter', function() {
 
       var stripes = VSyncHighlighter.generateStripes(
           this.times_, viewLWorld, viewRWorld);
-      if (stripes.length == 0) {
+      if (stripes.length === 0) {
         return;
       }
 
@@ -93,7 +93,7 @@ tr.exportTo('tr.ui.e.highlighter', function() {
       var opacity =
           (VSyncHighlighter.VSYNC_DENSITY_TRANSPARENT - clampedStripeDensity) /
           VSyncHighlighter.VSYNC_DENSITY_RANGE;
-      if (opacity == 0) {
+      if (opacity === 0) {
         return;
       }