Add cr-checkbox to Chrome

ui/webui/resources/cr_elements/cr_checkbox/cr_checkbox.html

Index: ui/webui/resources/cr_elements/cr_checkbox/cr_checkbox.html
diff --git a/ui/webui/resources/cr_elements/cr_checkbox/cr_checkbox.html b/ui/webui/resources/cr_elements/cr_checkbox/cr_checkbox.html
new file mode 100644
index 0000000000000000000000000000000000000000..0c15ead27823b49efe1d60189fd08d409fb09476
--- /dev/null
+++ b/ui/webui/resources/cr_elements/cr_checkbox/cr_checkbox.html
@@ -0,0 +1,15 @@
+<link rel="import"
+    href="chrome://resources/polymer/paper-checkbox/paper-checkbox.html">
+<link rel="import"
+    href="chrome://resources/cr_elements/cr_events/cr_events.html">
+
+<polymer-element name="cr-checkbox">
+  <template>
+    <link rel="stylesheet" href="cr_checkbox.css">
+    <cr-events id="events"></cr-events>
+    <paper-checkbox id="button"

[michaelpg, 2015/02/11 02:08:10]

label="{{ label }}"

[Oren Blasberg, 2015/02/11 20:12:42]

Done.

[michaelpg, 2015/02/18 00:11:16]

Sorry, I've realized this is just a convention from an older project but isn't
followed in Chrome or Polymer. Let's be consistent by avoiding spaces: {{label}}
from here on out.

[Oren Blasberg, 2015/02/18 00:17:01]

Done.

+        checked?="{{ checked }}" disabled?="{{ disabled }}">
+    </paper-checkbox>
+  </template>
+  <script src="cr_checkbox.js"></script>
+</polymer-element>