[ESLint] Fix violations when enabling curly rule in eslint.

tracing/tracing/ui/extras/about_tracing/inspector_connection.html

Index: tracing/tracing/ui/extras/about_tracing/inspector_connection.html
diff --git a/tracing/tracing/ui/extras/about_tracing/inspector_connection.html b/tracing/tracing/ui/extras/about_tracing/inspector_connection.html
index fbc7a7ac3f963eebc06352193c45a9be63e4bc67..21e3ea5183d04621bb5c04dc03ed7be4a4e44377 100644
--- a/tracing/tracing/ui/extras/about_tracing/inspector_connection.html
+++ b/tracing/tracing/ui/extras/about_tracing/inspector_connection.html
@@ -31,8 +31,9 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
    * @constructor
    */
   function InspectorConnection() {
-    if (InspectorConnection.instance)
+    if (InspectorConnection.instance) {
       throw new Error('Singleton');
+    }
 
     this.nextRequestId_ = 1;
     this.pendingRequestResolversId_ = {};
@@ -110,10 +111,11 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
     }
   };
 
-  if (window.DevToolsHost)
+  if (window.DevToolsHost) {
     InspectorConnection.instance = new InspectorConnection();
-  else
+  } else {
     InspectorConnection.instance = undefined;
+  }
 
   return {
     InspectorConnection,