Metrics logging for user engagement of the Reload and Feedback buttons

components/ui_metrics/BUILD.gn

Index: components/ui_metrics/BUILD.gn
diff --git a/components/ui_metrics/BUILD.gn b/components/ui_metrics/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..941ed1c5eef0a9e88777a681f853ce2b8faafc8c
--- /dev/null
+++ b/components/ui_metrics/BUILD.gn
@@ -0,0 +1,9 @@
+# Copyright 2017 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.
+
+source_set("ui_metrics") {
+  sources = [
+    "sadtab_metrics_types.h",
+  ]
+}