Enable WebViewTest.NestedGuestContainerBounds for --site-per-process

chrome/browser/apps/guest_view/web_view_browsertest.cc

Index: chrome/browser/apps/guest_view/web_view_browsertest.cc
diff --git a/chrome/browser/apps/guest_view/web_view_browsertest.cc b/chrome/browser/apps/guest_view/web_view_browsertest.cc
index 571a7e2d61c5f60ce2148e954626a7578ab47f50..d30fae5cbf29613ba3bf83385c2203385b533b17 100644
--- a/chrome/browser/apps/guest_view/web_view_browsertest.cc
+++ b/chrome/browser/apps/guest_view/web_view_browsertest.cc
@@ -3321,10 +3321,6 @@ IN_PROC_BROWSER_TEST_P(WebViewTest, Shim_TestFocusWhileFocused) {
 }
 
 IN_PROC_BROWSER_TEST_P(WebViewTest, NestedGuestContainerBounds) {
-  // TODO(lfg): https://crbug.com/581898
-  if (base::FeatureList::IsEnabled(::features::kGuestViewCrossProcessFrames))
-    return;
-
   TestHelper("testPDFInWebview", "web_view/shim", NO_TEST_SERVER);
 
   std::vector<content::WebContents*> guest_web_contents_list;