[Polymer] paper-radio-button mixin

third_party/polymer/v1_0/components-chromium/paper-radio-button/paper-radio-button.html

Index: third_party/polymer/v1_0/components-chromium/paper-radio-button/paper-radio-button.html
diff --git a/third_party/polymer/v1_0/components-chromium/paper-radio-button/paper-radio-button.html b/third_party/polymer/v1_0/components-chromium/paper-radio-button/paper-radio-button.html
index cd15f2e182588e38403b977e89bce4e73c9fc405..30e8bff84c004dace6eb8bae6e7e81e699a3bbe1 100644
--- a/third_party/polymer/v1_0/components-chromium/paper-radio-button/paper-radio-button.html
+++ b/third_party/polymer/v1_0/components-chromium/paper-radio-button/paper-radio-button.html
@@ -41,6 +41,7 @@ Custom property | Description | Default
 `--paper-radio-button-ink-size` | Size of the ripple | `48px`
 `--paper-radio-button-label-color` | Label color | `--primary-text-color`
 `--paper-radio-button-label-spacing` | Spacing between the label and the button | `10px`
+`--paper-radio-button-radio-container` | A mixin applied to the internal radio container | `{}`
 
 This element applies the mixin `--paper-font-common-base` but does not import `paper-styles/typography.html`.
 In order to apply the `Roboto` font to this element, make sure you've imported `paper-styles/typography.html`.
@@ -76,6 +77,8 @@ In order to apply the `Roboto` font to this element, make sure you've imported `
         width: var(--calculated-paper-radio-button-size);
         height: var(--calculated-paper-radio-button-size);
         vertical-align: middle;
+        
+        @apply(--paper-radio-button-radio-container);
       }
 
       #ink {