Add base class cr.ui.BubbleButton for options.ControlledSettingIndicator

chrome/browser/resources/shared/css/bubble_button.css

Index: chrome/browser/resources/shared/css/bubble_button.css
diff --git a/chrome/browser/resources/shared/css/bubble_button.css b/chrome/browser/resources/shared/css/bubble_button.css
new file mode 100644
index 0000000000000000000000000000000000000000..a69928937da87df4ad24026e6cffabb86226cf39
--- /dev/null
+++ b/chrome/browser/resources/shared/css/bubble_button.css
@@ -0,0 +1,19 @@
+/* Copyright (c) 2013 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. */

[James Hawkins, 2013/01/11 18:49:22]

nit: Final */ should be on the next line.

[bartfab (slow), 2013/01/11 19:45:56]

Done. Interestingly, all other CSS and JS files I checked also had the trailing
*/ in their license headers.

[James Hawkins, 2013/01/11 19:48:47]

I step away for 8 months and...

[Dan Beam, 2013/01/11 20:32:11]

This is not specified anywhere and the last I remember we weren't suggesting
either way, right?

+
+.bubble-button {
+  display: inline-block;
+  height: 0;
+  line-height: 1;
+  vertical-align: middle;
+  width: 16px;
+}
+
+.bubble-button > div {
+  background-size: 16px;
+  height: 16px;
+  position: relative;
+  top: -8px;
+  width: 16px;
+}