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

tracing/tracing/extras/importer/gzip_importer_test.html

Index: tracing/tracing/extras/importer/gzip_importer_test.html
diff --git a/tracing/tracing/extras/importer/gzip_importer_test.html b/tracing/tracing/extras/importer/gzip_importer_test.html
index ea64eb0188bff2a954a974756dbe931685d56355..c46192db3db1057487d6f69de68538a50c1a301f 100644
--- a/tracing/tracing/extras/importer/gzip_importer_test.html
+++ b/tracing/tracing/extras/importer/gzip_importer_test.html
@@ -43,8 +43,9 @@ tr.b.unittest.testSuite(function() {
     var gzipData = Base64.atob(GZIP_DATA_BASE_64);
     var buffer = new ArrayBuffer(gzipData.length);
     var view = new Uint8Array(buffer);
-    for (var i = 0; i < gzipData.length; i++)
+    for (var i = 0; i < gzipData.length; i++) {
       view[i] = gzipData.charCodeAt(i);
+    }
     var importer = new tr.e.importer.GzipImporter(null, buffer);
     assert.isTrue(tr.e.importer.GzipImporter.canImport(buffer));
     assert.equal(importer.extractSubtraces()[0], ORIGINAL_DATA);