1 files changed, 30 insertions, 0 deletions
diff --git a/chromium/v8/tools/zone-stats/helper.js b/chromium/v8/tools/zone-stats/helper.js
new file mode 100644
index 00000000000..a0d04859d1c
--- /dev/null
+++ b/chromium/v8/tools/zone-stats/helper.js
@@ -0,0 +1,30 @@
+// Copyright 2020 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+const KB = 1024;
+const MB = KB * KB;
+const GB = MB * KB;
+const kMillis2Seconds = 1 / 1000;
+
+function formatBytes(bytes) {
+  const units = [' B', ' KB', ' MB', ' GB'];
+  const divisor = 1024;
+  let index = 0;
+  while (index < units.length && bytes >= divisor) {
+    index++;
+    bytes /= divisor;
+  }
+  return bytes.toFixed(2) + units[index];
+}
+
+function formatSeconds(millis) {
+  return (millis * kMillis2Seconds).toFixed(2) + 's';
+}
+
+function defineCustomElement(name, generator) {
+  let htmlTemplatePath = name + '-template.html';
+  fetch(htmlTemplatePath)
+    .then(stream => stream.text())
+    .then(templateText => customElements.define(name, generator(templateText)));
+}