CSP 1.1: Implement the 'frame-ancestors' directive.

LayoutTests/http/tests/security/contentSecurityPolicy/1.1/frame-ancestors/frame-ancestors-nested-same-in-cross-url-allow-expected.txt

+CONSOLE MESSAGE: line 60: IFrame load event fired: the IFrame's location is 'http://localhost:8080/security/contentSecurityPolicy/resources/frame-ancestors.pl?policy=http://127.0.0.1:8000%20http://localhost:8080'.
+A 'frame-ancestors' CSP directive with a URL value should block or allow rendering in nested frames as appropriate.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS The inner IFrame passed.
+PASS successfullyParsed is true
+
+TEST COMPLETE
+
+
+--------
+Frame: '<!--framePath //<!--frame0-->-->'
+--------
+Testing a same-origin child with a policy of "http://127.0.0.1:8000 http://localhost:8080" nested in a cross-origin parent.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS The IFrame should not have been blocked. It wasn't.
+
+
+--------
+Frame: '<!--framePath //<!--frame0-->/<!--frame0-->-->'
+--------
+This is an IFrame sending a Content Security Policy header containing "frame-ancestors http://127.0.0.1:8000 http://localhost:8080".