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

tracing/tracing/ui/tracks/drawing_container.html

Index: tracing/tracing/ui/tracks/drawing_container.html
diff --git a/tracing/tracing/ui/tracks/drawing_container.html b/tracing/tracing/ui/tracks/drawing_container.html
index e3937671b8be0b47f9ee374e9c369715e00d0dee..56014ac31a0a01b7e3ae2fb8db65f720e0d523ee 100644
--- a/tracing/tracing/ui/tracks/drawing_container.html
+++ b/tracing/tracing/ui/tracks/drawing_container.html
@@ -128,12 +128,12 @@ tr.exportTo('tr.ui.tracks', function() {
       var innerHeight = lastChildTrackBounds.bottom - firstChildTrackBounds.top;
 
       var pixelRatio = window.devicePixelRatio || 1;
-      if (this.canvas_.width != innerWidth * pixelRatio) {
+      if (this.canvas_.width !== innerWidth * pixelRatio) {
         this.canvas_.width = innerWidth * pixelRatio;
         this.canvas_.style.width = innerWidth + 'px';
       }
 
-      if (this.canvas_.height != innerHeight * pixelRatio) {
+      if (this.canvas_.height !== innerHeight * pixelRatio) {
         this.canvas_.height = innerHeight * pixelRatio;
         this.canvas_.style.height = innerHeight + 'px';
       }