<webview>: Implement ExecuteScript

chrome/test/data/extensions/platform_apps/web_view/main.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var util = {};
 
 // Creates a <webview> tag in document.body and returns the reference to it.
 // It also sets a dummy src. The dummy src is significant because this makes
 // sure that the <object> shim is created (asynchronously at this point) for the
 // <webview> tag. This makes the <webview> tag ready for add/removeEventListener
@@ skipping 187 matching lines @@
       webview.setAttribute('src', 'data:text/html,trigger navigation');
       document.body.appendChild(webview);
       setTimeout(function() {
         try {
           webview.partition = 'illegal';
           chrome.test.fail();
         } catch (e) {
           chrome.test.succeed();
         }
       }, 0);
+    },
+
+    function webViewExecuteScript() {
+      var webview = document.createElement('webview');
+      webview.addEventListener('loadstop', function() {
+        webview.executeScript(
+          {code:'document.body.style.backgroundColor = "red";'},
+          function(results) {
+            chrome.test.assertEq(1, results.length);
+            chrome.test.assertEq('red', results[0]);
+            chrome.test.succeed();
+          });
+      });
+      webview.setAttribute('src', 'data:text/html,trigger navigation');
+      document.body.appendChild(webview);
     }
   ]);
 };