Plumb Task Scheduler Histograms to the Task Scheduler Internals Page

chrome/browser/resources/task_scheduler_internals/index.css

Index: chrome/browser/resources/task_scheduler_internals/index.css
diff --git a/chrome/browser/resources/task_scheduler_internals/index.css b/chrome/browser/resources/task_scheduler_internals/index.css
new file mode 100644
index 0000000000000000000000000000000000000000..91e0f6dd5e17ecc676f434a63be74a9e57c3c009
--- /dev/null
+++ b/chrome/browser/resources/task_scheduler_internals/index.css
@@ -0,0 +1,19 @@
+/* Copyright 2016 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file. */
+
+table {
+    border: 1px solid black;
+    border-collapse: collapse;
+}
+
+td,
+th {
+  border: 1px solid black;
+  padding: 5px;
+  text-align: center;
+}
+
+#details {
+  visibility: hidden;
+}