Implemented Document.contentType

LayoutTests/http/tests/dom/document-contentType-expected.txt

Index: LayoutTests/http/tests/dom/document-contentType-expected.txt
diff --git a/LayoutTests/http/tests/dom/document-contentType-expected.txt b/LayoutTests/http/tests/dom/document-contentType-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..34237a325d19137c54cec796fa229c2b3d34d2a1
--- /dev/null
+++ b/LayoutTests/http/tests/dom/document-contentType-expected.txt
@@ -0,0 +1,18 @@
+PASS successfullyParsed is true
+
+TEST COMPLETE
+PASS iframes[0].contentDocument.contentType is "text/css"
+PASS iframes[1].contentDocument.contentType is "application/x-javascript"
+PASS iframes[2].contentDocument.contentType is "text/html"
+PASS iframes[3].contentDocument.contentType is "text/html"
+PASS iframes[4].contentDocument.contentType is "text/xml"
+PASS iframes[5].contentDocument.contentType is "text/xml"
+PASS iframes[6].contentDocument.contentType is "text/html"
+PASS iframes[7].contentDocument.contentType is "text/html"
+PASS iframes[8].contentDocument.contentType is "text/plain"
+PASS iframes[9].contentDocument.contentType is "application/xml"
+PASS iframes[10].contentDocument.contentType is "image/bmp"
+PASS iframes[11].contentDocument.contentType is "image/gif"
+PASS iframes[12].contentDocument.contentType is "image/jpeg"
+PASS iframes[13].contentDocument.contentType is "image/png"
+