Auto merge of #15657 - servo:wpt-20170220, r=Ms2ger

Update web-platform-tests to revision 7a767a52741f628430ffbbed46e7f3df68ba3534.

Fixes #15648.

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/15657)
<!-- Reviewable:end -->

tests/wpt/metadata/FileAPI/historical.html.ini

@@ -0,0 +1,5 @@
+[historical.html]
+  type: testharness
+  [Blob.close() should not be supported]
+    expected: FAIL
+

tests/wpt/metadata/FileAPI/url/blob-url-in-sandboxed-iframe.html.ini

@@ -0,0 +1,9 @@
+[blob-url-in-sandboxed-iframe.html]
+  type: testharness
+  expected: TIMEOUT
+  [reading a Blob URL in an unconstrained iframe]
+    expected: TIMEOUT
+
+  [reading a Blob URL in a sandboxed iframe without the same-origin flag]
+    expected: NOTRUN
+

tests/wpt/metadata/FileAPI/url/multi-global-origin-serialization.sub.html.ini

@@ -0,0 +1,5 @@
+[multi-global-origin-serialization.sub.html]
+  type: testharness
+  [Blob URL serialization (specifically the origin) in multi-global situations]
+    expected: FAIL
+