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

tracing/tracing/ui/side_panel/side_panel_container.html

Index: tracing/tracing/ui/side_panel/side_panel_container.html
diff --git a/tracing/tracing/ui/side_panel/side_panel_container.html b/tracing/tracing/ui/side_panel/side_panel_container.html
index 9b959b91a354879c50eb3707f3125a2b1823f57b..2f2067f2e84daaac38972b8ba8719b8f2aaba963 100644
--- a/tracing/tracing/ui/side_panel/side_panel_container.html
+++ b/tracing/tracing/ui/side_panel/side_panel_container.html
@@ -186,14 +186,14 @@ Polymer({
 
   getPanelTypeForConstructor_: function(constructor) {
     for (var i = 0; i < this.tabStrip_.children.length; i++) {
-      if (this.tabStrip_.children[i].panelType.constructor == constructor)
+      if (this.tabStrip_.children[i].panelType.constructor === constructor)
         return this.tabStrip_.children[i].panelType;
     }
   },
 
   getLabelElementForPanelType_: function(panelType) {
     for (var i = 0; i < this.tabStrip_.children.length; i++) {
-      if (this.tabStrip_.children[i].panelType == panelType)
+      if (this.tabStrip_.children[i].panelType === panelType)
         return this.tabStrip_.children[i];
     }
     return undefined;
@@ -232,7 +232,7 @@ Polymer({
 
     // Restore the active panel, or collapse
     if (previouslyActivePanelType &&
-        supportedPanelTypes.indexOf(previouslyActivePanelType) != -1) {
+        supportedPanelTypes.indexOf(previouslyActivePanelType) !== -1) {
       this.activePanelType = previouslyActivePanelType;
       Polymer.dom(this).setAttribute('expanded', true);
     } else {
@@ -247,7 +247,7 @@ Polymer({
   },
 
   set rangeOfInterest(range) {
-    if (range == undefined)
+    if (range === undefined)
       throw new Error('Must not be undefined');
     this.rangeOfInterest_ = range;
     if (this.activePanel)