Implement cross-origin attributes using access check interceptors.

third_party/WebKit/LayoutTests/http/tests/security/w3c/cross-origin-objects-expected.txt

Index: third_party/WebKit/LayoutTests/http/tests/security/w3c/cross-origin-objects-expected.txt
diff --git a/third_party/WebKit/LayoutTests/http/tests/security/w3c/cross-origin-objects-expected.txt b/third_party/WebKit/LayoutTests/http/tests/security/w3c/cross-origin-objects-expected.txt
index f31920dd93ad2abb2d059f2143189cd0bed861dc..323f2ba70f4caa9f652fadc1f21f7aae0943281b 100644
--- a/third_party/WebKit/LayoutTests/http/tests/security/w3c/cross-origin-objects-expected.txt
+++ b/third_party/WebKit/LayoutTests/http/tests/security/w3c/cross-origin-objects-expected.txt
@@ -1,16 +1,16 @@
 This is a testharness.js-based test.
-FAIL Basic sanity-checking Blocked a frame with origin "http://web-platform.test:8000" from accessing a cross-origin frame.
-FAIL Only whitelisted properties are accessible cross-origin Blocked a frame with origin "http://web-platform.test:8000" from accessing a cross-origin frame.
+PASS Basic sanity-checking 
+PASS Only whitelisted properties are accessible cross-origin 
 PASS [[GetPrototypeOf]] should return null 
 PASS [[SetPrototypeOf]] should throw 
 PASS [[IsExtensible]] should return true for cross-origin objects 
 PASS [[PreventExtensions]] should throw for cross-origin objects 
 FAIL [[GetOwnProperty]] - Properties on cross-origin objects should be reported |own| Blocked a frame with origin "http://web-platform.test:8000" from accessing a cross-origin frame.
-FAIL [[GetOwnProperty]] - Property descriptors for cross-origin properties should be set up correctly assert_equals: property descriptor for location should be non-enumerable expected false but got true
+FAIL [[GetOwnProperty]] - Property descriptors for cross-origin properties should be set up correctly assert_equals: property descriptor for postMessage should have writable: false expected false but got true

[dcheng, 2016/12/07 08:19:08]

I haven't quite figured out how to fix this: I think this is getting derived
from the actual value returned by originSafePostMessageMethodGetter. I think
this is probably the biggest remaining issue, and I'm currently debugging it.

 PASS [[Delete]] Should throw on cross-origin objects 
 PASS [[DefineOwnProperty]] Should throw for cross-origin objects 
 PASS [[Enumerate]] should return an empty iterator 
-FAIL [[OwnPropertyKeys]] should return all properties from cross-origin objects assert_array_equals: Object.getOwnPropertyNames() gives the right answer for cross-origin Window lengths differ, expected 13 got 12
+FAIL [[OwnPropertyKeys]] should return all properties from cross-origin objects assert_array_equals: Object.getOwnPropertyNames() gives the right answer for cross-origin Location lengths differ, expected 2 got 3
 PASS A and B jointly observe the same identity for cross-origin Window and Location 
 PASS Cross-origin functions get local Function.prototype 
 FAIL Cross-origin Window accessors get local Function.prototype Cannot read property 'name' of undefined