<webview>: Add additional WebRequest API test coverage.

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 = '';
 embedder.redirectGuestURL = '';
 embedder.redirectGuestURLDest = '';
 embedder.closeSocketURL = '';
 embedder.tests = {};
 
 embedder.setUp_ = function(config) {
   if (!config || !config.testServer) {
     return;
   }
   embedder.baseGuestURL = 'http://localhost:' + config.testServer.port;
   embedder.emptyGuestURL = embedder.baseGuestURL +
       '/extensions/platform_apps/web_view/shim/empty_guest.html';
   embedder.windowOpenGuestURL = embedder.baseGuestURL +
       '/extensions/platform_apps/web_view/shim/guest.html';
   embedder.noReferrerGuestURL = embedder.baseGuestURL +
       '/extensions/platform_apps/web_view/shim/guest_noreferrer.html';
+  embedder.detectUserAgentURL = embedder.baseGuestURL + '/detect-user-agent';
   embedder.redirectGuestURL = embedder.baseGuestURL + '/server-redirect';
   embedder.redirectGuestURLDest = embedder.baseGuestURL +
       '/extensions/platform_apps/web_view/shim/guest_redirect.html';
   embedder.closeSocketURL = embedder.baseGuestURL + '/close-socket';
   embedder.testImageBaseURL = embedder.baseGuestURL +
       '/extensions/platform_apps/web_view/shim/';
   embedder.virtualURL = 'http://virtualurl/';
 };
 
 window.runTest = function(testName) {
@@ skipping 1039 matching lines @@
 // webview.
 function testWebRequestAPI() {
   var webview = new WebView();
   webview.request.onBeforeRequest.addListener(function(e) {
     embedder.test.succeed();
   }, { urls: ['<all_urls>']}) ;
   webview.src = embedder.windowOpenGuestURL;
   document.body.appendChild(webview);
 }
 
+// This test verifies that the WebRequest API onBeforeSendHeaders event fires on
+// webview and supports headers. This tests verifies that we can modify HTTP
+// headers via the WebRequest API and those modified headers will be sent to the
+// HTTP server.
+function testWebRequestAPIWithHeaders() {
+  var webview = new WebView();
+  var requestFilter = {
+    urls: ['<all_urls>']
+  };
+  var extraInfoSpec = ['requestHeaders', 'blocking'];
+  webview.request.onBeforeSendHeaders.addListener(function(details) {
+    var headers = details.requestHeaders;
+    for( var i = 0, l = headers.length; i < l; ++i ) {
+      if (headers[i].name == 'User-Agent') {
+        headers[i].value = 'foobar';
+        break;
+      }
+    }
+    var blockingResponse = {};
+    blockingResponse.requestHeaders = headers;
+    return blockingResponse;
+  }, requestFilter, extraInfoSpec);
+
+  var loadstartCalled = false;
+  webview.addEventListener('loadstart', function(e) {
+    embedder.test.assertTrue(e.isTopLevel);
+    embedder.test.assertEq(embedder.detectUserAgentURL, e.url);
+    loadstartCalled = true;
+  });
+
+  webview.addEventListener('loadredirect', function(e) {
+    embedder.test.assertTrue(e.isTopLevel);
+    embedder.test.assertEq(embedder.detectUserAgentURL,
+        e.oldUrl.replace('127.0.0.1', 'localhost'));
+    embedder.test.assertEq(embedder.redirectGuestURLDest,
+        e.newUrl.replace('127.0.0.1', 'localhost'));
+    if (loadstartCalled) {
+      embedder.test.succeed();
+    } else {
+      embedder.test.fail();
+    }
+  });
+  webview.src = embedder.detectUserAgentURL;
+  document.body.appendChild(webview);
+}
+
 // This test verifies that the basic use cases of the declarative WebRequest API
 // work as expected. This test demonstrates that rules can be added prior to
 // navigation and attachment.
 // 1. It adds a rule to block URLs that contain guest.
 // 2. It attempts to navigate to a guest.html page.
 // 3. It detects the appropriate loadabort message.
 // 4. It removes the rule blocking the page and reloads.
 // 5. The page loads successfully.
 function testDeclarativeWebRequestAPI() {
   var step = 1;
@@ skipping 873 matching lines @@
   'testPluginLoadPermission': testPluginLoadPermission,
   'testNewWindow': testNewWindow,
   'testNewWindowTwoListeners': testNewWindowTwoListeners,
   'testNewWindowNoPreventDefault': testNewWindowNoPreventDefault,
   'testNewWindowNoReferrerLink': testNewWindowNoReferrerLink,
   'testContentLoadEvent': testContentLoadEvent,
   'testDeclarativeWebRequestAPI': testDeclarativeWebRequestAPI,
   'testDeclarativeWebRequestAPISendMessage':
       testDeclarativeWebRequestAPISendMessage,
   'testWebRequestAPI': testWebRequestAPI,
+  'testWebRequestAPIWithHeaders': testWebRequestAPIWithHeaders,
   'testWebRequestAPIGoogleProperty': testWebRequestAPIGoogleProperty,
   'testWebRequestListenerSurvivesReparenting':
       testWebRequestListenerSurvivesReparenting,
   'testGetProcessId': testGetProcessId,
   'testHiddenBeforeNavigation': testHiddenBeforeNavigation,
   'testLoadStartLoadRedirect': testLoadStartLoadRedirect,
   'testLoadAbortChromeExtensionURLWrongPartition':
       testLoadAbortChromeExtensionURLWrongPartition,
   'testLoadAbortEmptyResponse': testLoadAbortEmptyResponse,
   'testLoadAbortIllegalChromeURL': testLoadAbortIllegalChromeURL,
@@ skipping 17 matching lines @@
   'testFindAPI_findupdate': testFindAPI,
   'testLoadDataAPI': testLoadDataAPI
 };
 
 onload = function() {
   chrome.test.getConfig(function(config) {
     embedder.setUp_(config);
     chrome.test.sendMessage("Launched");
   });
 };