[Extensions Bindings] Add native declarativeContent verification

chrome/test/data/extensions/api_test/native_bindings/declarative_content/background.js

 // Copyright 2017 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.
 
 // Register a rule to show the page action whenever we see a page with 'example'
 // in the host. Send messages after registration of the rule is complete and
 // when the page action is clicked.
 
 const kRuleId = 'rule1';
 
+var imageData = new ImageData(19, 19);
+
 var rule = {
   conditions: [
     new chrome.declarativeContent.PageStateMatcher(
         {pageUrl: {hostPrefix: 'example'}}),
   ], actions: [
     new chrome.declarativeContent.ShowPageAction(),
+    new chrome.declarativeContent.SetIcon({imageData: imageData}),
   ],
   id: kRuleId,
 };
 
 chrome.pageAction.onClicked.addListener(function() {
   chrome.declarativeContent.onPageChanged.removeRules([kRuleId], function() {
     chrome.declarativeContent.onPageChanged.getRules(function(rules) {
       chrome.test.assertEq(0, rules.length);
       chrome.test.sendMessage('clicked and removed');
     });
   });
 });
 
 chrome.declarativeContent.onPageChanged.addRules([rule], function() {
   chrome.declarativeContent.onPageChanged.getRules(function(rules) {
     chrome.test.assertEq(1, rules.length);
     chrome.test.assertEq(kRuleId, rules[0].id);
     chrome.test.sendMessage('ready');
   });
 });
+
+function didThrow(func) {
+  var caught = false;
+  try {
+    func();
+  } catch (e) {
+    caught = true;
+  }
+  return caught;
+}
+
+chrome.test.runTests([
+  function validationCheck() {
+    // Test that type constructions are properly validated.
+    chrome.test.assertTrue(didThrow(function() {
+      var matcher = new chrome.declarativeContent.PageStateMatcher(
+          {pageUrl: {fake: 'bogus'}});
+    }));
+    chrome.test.succeed();
+  },
+]);