Block renderer-initiated main frame navigations to data URLs

chrome/test/data/extensions/platform_apps/web_view/shim/main.js

Index: chrome/test/data/extensions/platform_apps/web_view/shim/main.js
diff --git a/chrome/test/data/extensions/platform_apps/web_view/shim/main.js b/chrome/test/data/extensions/platform_apps/web_view/shim/main.js
index dfedddcd7315d03324beb360b30cdeeb9ec1b699..473d81db7217e6818d28711508090b5235a7fe82 100644
--- a/chrome/test/data/extensions/platform_apps/web_view/shim/main.js
+++ b/chrome/test/data/extensions/platform_apps/web_view/shim/main.js
@@ -1313,7 +1313,7 @@ function testExecuteScriptIsAbortedWhenWebViewSourceIsChanged() {
   webview.addEventListener('loadstop', function onLoadStop(e) {
     window.console.log('2. Inject script to trigger a guest-initiated ' +
         'navigation.');
-    var navUrl = 'data:text/html,trigger nav';
+    var navUrl = 'data:text/html, trigger nav';
     webview.executeScript({
       code: 'window.location.href = "' + navUrl + '";'
     });
@@ -1321,7 +1321,7 @@ function testExecuteScriptIsAbortedWhenWebViewSourceIsChanged() {
     window.console.log('3. Listening for the load that will be started as a ' +
         'result of 2.');
     webview.addEventListener('loadstart', function onLoadStart(e) {
-      embedder.test.assertEq('about:blank', webview.src);
+      embedder.test.assertEq('data:text/html, initial page', webview.src);
       window.console.log('4. Attempting to inject script into about:blank. ' +
           'This is expected to fail.');
       webview.executeScript(
@@ -1340,7 +1340,7 @@ function testExecuteScriptIsAbortedWhenWebViewSourceIsChanged() {
   });
 
   window.console.log('1. Performing initial navigation.');
-  webview.setAttribute('src', 'about:blank');
+  webview.setAttribute('src', 'data:text/html, initial page');
   document.body.appendChild(webview);
 }