Remove unused EnableAdviewSrcAttribute command line flag.

chrome/test/data/extensions/platform_apps/ad_view/properties_exposed/chrometest.js

Index: chrome/test/data/extensions/platform_apps/ad_view/properties_exposed/chrometest.js
diff --git a/chrome/test/data/extensions/platform_apps/ad_view/properties_exposed/chrometest.js b/chrome/test/data/extensions/platform_apps/ad_view/properties_exposed/chrometest.js
index 352df34c22d78222e0ffbc4af19df5b93881966e..1dd26237400d983ce900d9ed47ef907105f30f09 100644
--- a/chrome/test/data/extensions/platform_apps/ad_view/properties_exposed/chrometest.js
+++ b/chrome/test/data/extensions/platform_apps/ad_view/properties_exposed/chrometest.js
@@ -5,20 +5,15 @@
 // This test checks that <adview> attributes are also exposed as properties
 // (with the same name and value).
 
-function runTests(guestURL) {
+function runTests() {
   chrome.test.runTests([
     function test() {
       var adview = document.getElementsByTagName('adview')[0];
       var adnetwork = adview.getAttribute('ad-network');
 
-      adview.setAttribute('src', guestURL);
-
       // Timeout is necessary to give the mutation observers a chance to fire.
       // http://lists.w3.org/Archives/Public/public-webapps/2011JulSep/1622.html
       setTimeout(function() {
-        chrome.test.assertEq(guestURL, adview.getAttribute('src'));
-        chrome.test.assertEq(guestURL, adview['src']);
-
         chrome.test.assertEq(adnetwork, adview.getAttribute('ad-network'));
         chrome.test.assertEq(adnetwork, adview['ad-network']);
 
@@ -31,8 +26,6 @@ function runTests(guestURL) {
 
 window.onload = function() {
   chrome.test.getConfig(function(config) {
-    var guestURL = 'http://localhost:' + config.testServer.port +
-      '/extensions/platform_apps/ad_view/ad_network_site/testsdk.html';
-    runTests(guestURL);
+    runTests();
   });
 }