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

tracing/tracing/ui/extras/about_tracing/xhr_based_tracing_controller_client.html

Index: tracing/tracing/ui/extras/about_tracing/xhr_based_tracing_controller_client.html
diff --git a/tracing/tracing/ui/extras/about_tracing/xhr_based_tracing_controller_client.html b/tracing/tracing/ui/extras/about_tracing/xhr_based_tracing_controller_client.html
index d6ca756bb193ae1bd16e02070d06088baa45e15d..a33e614813ed8714b117affdb17b2663e97085d3 100644
--- a/tracing/tracing/ui/extras/about_tracing/xhr_based_tracing_controller_client.html
+++ b/tracing/tracing/ui/extras/about_tracing/xhr_based_tracing_controller_client.html
@@ -20,13 +20,13 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
       data = null;
     return new Promise(function(resolve, reject) {
       var req = new XMLHttpRequest();
-      if (method != 'POST' && data !== null)
+      if (method !== 'POST' && data !== null)
         throw new Error('Non-POST should have data==null');
       req.open(method, path, true);
       req.onreadystatechange = function(e) {
-        if (req.readyState == 4) {
+        if (req.readyState === 4) {
           window.setTimeout(function() {
-            if (req.status == 200 && req.responseText != '##ERROR##') {
+            if (req.status === 200 && req.responseText !== '##ERROR##') {
               resolve(req.responseText);
             } else {
               reject(new Error('Error occured at ' + path));