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

tracing/tracing/base/extension_registry.html

Index: tracing/tracing/base/extension_registry.html
diff --git a/tracing/tracing/base/extension_registry.html b/tracing/tracing/base/extension_registry.html
index 0bc0b5b9e5c269b23dc5919b14d9a3f99f6996d1..713a79045c21b9876feb2bd6032322a2913ccdf5 100644
--- a/tracing/tracing/base/extension_registry.html
+++ b/tracing/tracing/base/extension_registry.html
@@ -45,9 +45,9 @@ tr.exportTo('tr.b', function() {
       throw new Error('Already has registry');
 
     registryOptions.freeze();
-    if (registryOptions.mode == tr.b.BASIC_REGISTRY_MODE) {
+    if (registryOptions.mode === tr.b.BASIC_REGISTRY_MODE) {
       tr.b._decorateBasicExtensionRegistry(registry, registryOptions);
-    } else if (registryOptions.mode == tr.b.TYPE_BASED_REGISTRY_MODE) {
+    } else if (registryOptions.mode === tr.b.TYPE_BASED_REGISTRY_MODE) {
       tr.b._decorateTypeBasedExtensionRegistry(registry, registryOptions);
     } else {
       throw new Error('Unrecognized mode');