Allows MHTM page to open a popup

third_party/WebKit/Source/web/tests/MHTMLTest.cpp

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 258 matching lines @@
 
   // Register the mocked frame and load it.
   RegisterMockedURLLoad(kURL, "simple_test.mht");
   LoadURLInTopFrame(ToKURL(kURL));
   ASSERT_TRUE(GetPage());
   LocalFrame* frame = ToLocalFrame(GetPage()->MainFrame());
   ASSERT_TRUE(frame);
   Document* document = frame->GetDocument();
   ASSERT_TRUE(document);
 
-  // Full sandboxing should be turned on.
-  EXPECT_TRUE(document->IsSandboxed(kSandboxAll));
+  // Full sandboxing with the exception to new top-level windows should be
+  // turned on.
+  EXPECT_EQ(kSandboxAll & ~(kSandboxPopups |
+                            kSandboxPropagatesToAuxiliaryBrowsingContexts),
+            document->GetSandboxFlags());
 
   // MHTML document should be loaded into unique origin.
   EXPECT_TRUE(document->GetSecurityOrigin()->IsUnique());
   // Script execution should be disabled.
   EXPECT_FALSE(document->CanExecuteScripts(kNotAboutToExecuteScript));
 }
 
 }  // namespace blink