Implement a permission check for push.

chrome/browser/resources/options/content_settings.html

Index: chrome/browser/resources/options/content_settings.html
diff --git a/chrome/browser/resources/options/content_settings.html b/chrome/browser/resources/options/content_settings.html
index 176c72d650dfcb928ec82f0be5aa44c83adeac63..d96f4f8c096210a93af2a64b9f29101b046789c8 100644
--- a/chrome/browser/resources/options/content_settings.html
+++ b/chrome/browser/resources/options/content_settings.html
@@ -585,6 +585,34 @@
         </div>
       </div>
     </section>
+    <!-- Push messaging filter -->
+    <section id="experimental-push-messaging-settings" hidden="true">
+      <h3 i18n-content="push-messaging_header"></h3>
+      <div>
+        <div class="radio">
+          <label>
+            <input type="radio" name="push-messaging" value="allow">
+            <span i18n-content="pushMessagingAllow"></span>
+          </label>
+        </div>
+        <div class="radio">
+          <label>
+            <input type="radio" name="push-messaging" value="ask">
+            <span i18n-content="pushMessagingAsk"></span>
+          </label>
+        </div>
+        <div class="radio">
+          <label>
+            <input type="radio" name="push-messaging" value="block">
+            <span i18n-content="pushMessagingBlock"></span>
+          </label>
+        </div>
+        <div class="settings-row">
+          <button class="exceptions-list-button" contentType="push-messaging"
+              i18n-content="manageExceptions"></button>
+        </div>
+      </div>
+    </section>
     <!-- Page zoom levels -->
     <section id="page-zoom-levels">
       <h3 i18n-content="zoomlevels_header"></h3>