Bug 1477458 - Add test for XML Pretty Print with restrictive CSP. r=bz

MozReview-Commit-ID: 3OkdYbkci40

--HG--
extra : rebase_source : 17aac4bb4b73a52b72e9feaa498270db34543e2f

dom/base/test/reftest/reftest.list

@@ -1 +1,2 @@
 == test_bug920877.html test_bug920877-ref.html
+HTTP == test_xmlPrettyPrint_csp.xml test_xmlPrettyPrint_csp-ref.xml

dom/base/test/reftest/test_xmlPrettyPrint_csp-ref.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0"?>
+<xml>
+  This is an XML document
+</xml>

dom/base/test/reftest/test_xmlPrettyPrint_csp.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0"?>
+<xml>
+  This is an XML document
+</xml>

dom/base/test/reftest/test_xmlPrettyPrint_csp.xml^headers^

@@ -0,0 +1 @@
+Content-Security-Policy: default-src 'none';