<webview>: First stab at implementing media permission request for guests.

chrome/test/data/extensions/platform_apps/web_view/media_access/deny/embedder.js

Index: chrome/test/data/extensions/platform_apps/web_view/media_access/deny/embedder.js
diff --git a/chrome/test/data/extensions/platform_apps/web_view/media_access/deny/embedder.js b/chrome/test/data/extensions/platform_apps/web_view/media_access/deny/embedder.js
new file mode 100644
index 0000000000000000000000000000000000000000..19246c033139dcd4057f73d05b6b5a99cc89da3f
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+++ b/chrome/test/data/extensions/platform_apps/web_view/media_access/deny/embedder.js
@@ -0,0 +1,187 @@
+// Copyright 2013 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 embedder = {};
+embedder.tests = {};
+embedder.baseGuestURL = '';
+embedder.guestURL = '';
+
+/** @private */
+embedder.setUpGuest_ = function() {
+  document.querySelector('#webview-tag-container').innerHTML =
+      '<webview style="width: 100px; height: 100px;"' +
+      ' src="' + embedder.guestURL + '"' +
+      '></webview>';
+  var webview = document.querySelector('webview');
+  if (!webview) {
+    chrome.test.fail('No <webview> element created');
+  }
+  return webview;
+};
+
+/** @private */
+embedder.setUpLoadStop_ = function(webview, testName) {
+  var onWebViewLoadStop = function(e) {
+    // Send post message to <webview> when it's ready to receive them.
+    webview.contentWindow.postMessage(
+        JSON.stringify(['check-media-permission', '' + testName]), '*');
+  };
+  webview.addEventListener('loadstop', onWebViewLoadStop);
+};
+
+/** @private */
+embedder.registerAndWaitForPostMessage_ = function(webview, testName) {
+  var onPostMessageReceived = function(e) {
+    var data = JSON.parse(e.data);
+    if (data[1] == '' + testName) {
+      chrome.test.assertEq('access-denied', data[0]);
+      chrome.test.succeed();
+    }
+  };
+  window.addEventListener('message', onPostMessageReceived);
+};
+
+/** @private */
+embedder.assertCorrectMediaEvent_ = function(e) {
+  chrome.test.assertEq('media', e.permission);
+  chrome.test.assertTrue(!!e.url);
+  chrome.test.assertTrue(e.url.indexOf(embedder.baseGuestURL) == 0);
+};
+
+// Each test loads a guest which requests media access.
+// All tests listed in this file expect the guest's request to be denied.
+//
+// Once the guest is denied media access, the guest notifies the embedder about
+// the fact via post message.
+// The embedder has to initiate a post message so that the guest can get a
+// reference to embedder to send the reply back.
+
+embedder.tests.testDeny = function testDeny() {
+  var webview = embedder.setUpGuest_();
+
+  var onPermissionRequest = function(e) {
+    chrome.test.log('Embedder notified on permissionRequest');
+    chrome.test.assertEq('media', e.permission);
+    chrome.test.assertTrue(!!e.url);
+    chrome.test.assertTrue(e.url.indexOf(embedder.baseGuestURL) == 0);
+
+    e.request.deny();
+    // Calling allow/deny after this should raise exception.
+    ['allow', 'deny'].forEach(function(funcName) {
+      var exceptionCaught = false;
+      try {
+        e.request[funcName]();
+      } catch (exception) {
+        exceptionCaught = true;
+      }
+      if (!exceptionCaught) {
+        chrome.test.fail('Expected exception on multiple e.allow()');
+      }
+    });
+  };
+  webview.addEventListener('permissionrequest', onPermissionRequest);
+
+  embedder.setUpLoadStop_(webview, 'test1');
+  embedder.registerAndWaitForPostMessage_(webview, 'test1');
+};
+
+embedder.tests.testDenyThenAllowThrows = function testDenyThenAllowThrows() {
+  var webview = embedder.setUpGuest_();
+
+  var exceptionCount = 0;
+  var callCount = 0;
+  var denyCalled = false;
+  var callDenyAndCheck = function(e) {
+    try {
+      if (!denyCalled) {
+        e.request.deny();
+        denyCalled = true;
+      } else {
+        e.request.allow();
+      }
+      ++callCount;
+    } catch (ex) {
+      ++exceptionCount;
+    }
+    if (callCount == 1 && exceptionCount == 1) {
+      chrome.test.succeed();
+    }
+  };
+
+  var onPermissionRequest1 = function(e) {
+    embedder.assertCorrectMediaEvent_(e);
+    callDenyAndCheck(e);
+  };
+  var onPermissionRequest2 = function(e) {
+    embedder.assertCorrectMediaEvent_(e);
+    callDenyAndCheck(e);
+  };
+  webview.addEventListener('permissionrequest', onPermissionRequest1);
+  webview.addEventListener('permissionrequest', onPermissionRequest2);
+
+  embedder.setUpLoadStop_(webview, 'test2');
+  embedder.registerAndWaitForPostMessage_(webview, 'test2');
+};
+
+embedder.tests.testDenyWithPreventDefault =
+    function testDenyWithPreventDefault() {
+  var webview = embedder.setUpGuest_();
+
+  var onPermissionRequest = function(e) {
+    embedder.assertCorrectMediaEvent_(e);
+    e.preventDefault();
+    // Deny asynchronously.
+    window.setTimeout(function() { e.request.deny(); });
+  };
+  webview.addEventListener('permissionrequest', onPermissionRequest);
+
+  embedder.setUpLoadStop_(webview, 'test3');
+  embedder.registerAndWaitForPostMessage_(webview, 'test3');
+};
+
+embedder.tests.testNoListenersImplyDeny = function testNoListenersImplyDeny() {
+  var webview = embedder.setUpGuest_();
+  embedder.setUpLoadStop_(webview, 'test4');
+  embedder.registerAndWaitForPostMessage_(webview, 'test4');
+};
+
+embedder.tests.testNoPreventDefaultImpliesDeny =
+    function testNoPreventDefaultImpliesDeny() {
+  var webview = embedder.setUpGuest_();
+
+  var onPermissionRequest = function(e) {
+    embedder.assertCorrectMediaEvent_(e);
+    window.setTimeout(function() {
+      // Allowing asynchronously. Since we didn't call preventDefault(), the
+      // request will be denied before we get here.
+      try {
+        e.request.allow();
+      } catch (exception) {
+        // Ignore.
+      }
+    });
+  };
+  webview.addEventListener('permissionrequest', onPermissionRequest);
+
+  embedder.setUpLoadStop_(webview, 'test5');
+  embedder.registerAndWaitForPostMessage_(webview, 'test5');
+};
+
+onload = function() {
+  chrome.test.getConfig(function(config) {
+    embedder.baseGuestURL = 'http://localhost:' + config.testServer.port;
+    embedder.guestURL = embedder.baseGuestURL +
+        '/files/extensions/platform_apps/web_view/media_access' +
+        '/media_access_guest.html';
+    chrome.test.log('Guest url is: ' + embedder.guestURL);
+
+    chrome.test.runTests([
+      embedder.tests.testDeny,
+      embedder.tests.testDenyThenAllowThrows,
+      embedder.tests.testDenyWithPreventDefault,
+      embedder.tests.testNoListenersImplyDeny,
+      embedder.tests.testNoPreventDefaultImpliesDeny
+    ]);
+  });
+};