Implement declarative content script API for <webview> [js part].

chrome/test/data/extensions/platform_apps/web_view/shim/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 = {};
 var embedder = {};
 embedder.baseGuestURL = '';
 embedder.emptyGuestURL = '';
 embedder.windowOpenGuestURL = '';
 embedder.noReferrerGuestURL = '';
@@ skipping 527 matching lines @@
     // Try to overwrite webview.request, shall not succeed.
     webview.request = '123';
     embedder.test.assertTrue(typeof webview.request !== 'string');
 
     embedder.test.succeed();
   });
   webview.setAttribute('src', 'data:text/html,webview check api');
   document.body.appendChild(webview);
 }
 
+function testDeclarativeContentAPIExistence() {
+  var apiPropertiesToCheck = [
+    // Declarative Content API.
+    'onPageChanged'
+  ];
+  var webview = document.createElement('webview');
+  webview.setAttribute('partition', arguments.callee.name);
+  webview.addEventListener('loadstop', function(e) {
+    for (var i = 0; i < apiPropertiesToCheck.length; ++i) {
+      embedder.test.assertEq('object',
+                             typeof webview.request[apiPropertiesToCheck[i]]);
+      embedder.test.assertEq(
+          'function',
+          typeof webview.request[apiPropertiesToCheck[i]].addRules);
+      embedder.test.assertEq(
+          'function',
+          typeof webview.request[apiPropertiesToCheck[i]].getRules);
+      embedder.test.assertEq(
+          'function',
+          typeof webview.request[apiPropertiesToCheck[i]].removeRules);
+    }
+
+    // Try to overwrite webview.request, shall not succeed.
+    webview.request = '123';
+    embedder.test.assertTrue(typeof webview.request !== 'string');
+
+    embedder.test.succeed();
+  });
+  webview.setAttribute('src', 'data:text/html,webview check api');
+  document.body.appendChild(webview);
+}
+
 // This test verifies that the loadstart, loadstop, and exit events fire as
 // expected.
 function testEventName() {
   var webview = document.createElement('webview');
   webview.setAttribute('partition', arguments.callee.name);
 
   webview.addEventListener('loadstart', function(evt) {
     embedder.test.assertEq('loadstart', evt.type);
   });
 
@@ skipping 1451 matching lines @@
   'testAutosizeWithPartialAttributes': testAutosizeWithPartialAttributes,
   'testAPIMethodExistence': testAPIMethodExistence,
   'testChromeExtensionURL': testChromeExtensionURL,
   'testChromeExtensionRelativePath': testChromeExtensionRelativePath,
   'testDisplayNoneWebviewLoad': testDisplayNoneWebviewLoad,
   'testDisplayNoneWebviewRemoveChild': testDisplayNoneWebviewRemoveChild,
   'testInlineScriptFromAccessibleResources':
       testInlineScriptFromAccessibleResources,
   'testInvalidChromeExtensionURL': testInvalidChromeExtensionURL,
   'testWebRequestAPIExistence': testWebRequestAPIExistence,
+  'testDeclarativeContentAPIExistence': testDeclarativeContentAPIExistence,
   'testEventName': testEventName,
   'testOnEventProperties': testOnEventProperties,
   'testLoadProgressEvent': testLoadProgressEvent,
   'testDestroyOnEventListener': testDestroyOnEventListener,
   'testCannotMutateEventName': testCannotMutateEventName,
   'testPartitionChangeAfterNavigation': testPartitionChangeAfterNavigation,
   'testPartitionRemovalAfterNavigationFails':
       testPartitionRemovalAfterNavigationFails,
   'testExecuteScriptFail': testExecuteScriptFail,
   'testExecuteScript': testExecuteScript,
@@ skipping 48 matching lines @@
   'testFindAPI_findupdate': testFindAPI,
   'testLoadDataAPI': testLoadDataAPI
 };
 
 onload = function() {
   chrome.test.getConfig(function(config) {
     embedder.setUp_(config);
     chrome.test.sendMessage("Launched");
   });
 };