MD Settings: convert paper-icon-button to paper-icon-button-light.

chrome/browser/resources/settings/site_settings/zoom_levels.html

Index: chrome/browser/resources/settings/site_settings/zoom_levels.html
diff --git a/chrome/browser/resources/settings/site_settings/zoom_levels.html b/chrome/browser/resources/settings/site_settings/zoom_levels.html
index 50bd0b1446a7e2f343af23c59e27d091873b2874..5079bf89a4b7a562fbddbbb940a4a6754699774d 100644
--- a/chrome/browser/resources/settings/site_settings/zoom_levels.html
+++ b/chrome/browser/resources/settings/site_settings/zoom_levels.html
@@ -1,6 +1,6 @@
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
-<link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="../i18n_setup.html">
 <link rel="import" href="../settings_shared_css.html">
@@ -34,8 +34,9 @@
           </div>
           <div class="zoom-label">[[item.zoom]]</div>
           <div>
-            <paper-icon-button icon="cr:clear" on-tap="removeZoomLevel_"
-                title="$i18n{siteSettingsRemoveZoomLevel}"></paper-icon-button>
+            <button is="paper-icon-button-light" class="icon-clear"
+                on-tap="removeZoomLevel_"
+                title="$i18n{siteSettingsRemoveZoomLevel}"></button>
           </div>
         </div>
       </template>