Do not rewrite about urls to chrome:// for cetain renderer-initated loads

ios/chrome/browser/web/window_open_by_dom_egtest.mm

Index: ios/chrome/browser/web/window_open_by_dom_egtest.mm
diff --git a/ios/chrome/browser/web/window_open_by_dom_egtest.mm b/ios/chrome/browser/web/window_open_by_dom_egtest.mm
index 631be43519c5907f3feaaa69e71f93c06530ff31..fbfe60f2b2323bfc7548f35ba4b82107a5716de9 100644
--- a/ios/chrome/browser/web/window_open_by_dom_egtest.mm
+++ b/ios/chrome/browser/web/window_open_by_dom_egtest.mm
@@ -203,8 +203,7 @@ NSString* GetBlockedPopupInfobarText(size_t blocked_count) {
 // Tests opening a child window using the following link
 // <a href="data:text/html,<script>window.location='about:newtab';</script>"
 //    target="_blank">
-// TODO(crbug.com/687863): Enable this test.
-- (void)DISABLED_testWindowOpenWithAboutNewTabScript {
+- (void)testWindowOpenWithAboutNewTabScript {
   TapWebViewElementWithId("webScenarioWindowOpenWithAboutNewTabScript");
   AssertMainTabCount(2);
   [[EarlGrey selectElementWithMatcher:OmniboxText("about:newtab")]