Add a readonly attribute to cr-input.

ui/webui/resources/cr_elements/cr_input/cr_input.html

Index: ui/webui/resources/cr_elements/cr_input/cr_input.html
diff --git a/ui/webui/resources/cr_elements/cr_input/cr_input.html b/ui/webui/resources/cr_elements/cr_input/cr_input.html
index e0eddc3deac7f3a0e0574942a69ab019e2caf89d..2e8e00822b5b629e0ac1a206ef4c2e9ce6a65e38 100644
--- a/ui/webui/resources/cr_elements/cr_input/cr_input.html
+++ b/ui/webui/resources/cr_elements/cr_input/cr_input.html
@@ -16,7 +16,7 @@
         isInvalid="{{!$.input.validity.valid}}">
       <input is="core-input" id="input" value="{{value}}"
           committedValue="{{committedValue}}" disabled?="{{disabled}}"
-          required?="{{required}}" type="{{type}}">
+          required?="{{required}}" readonly?="{{readonly}}" type="{{type}}">

[Oren Blasberg, 2015/03/04 20:25:44]

Where does "readonly?" come from? When I search the polymer repo for core-input
for "readonly" I don't get any results.

I just want to understand how this wokrs.

     </paper-input-decorator>
   </template>
   <script src="cr_input.js"></script>