[SharedArrayBuffer] Prevent SharedArrayBuffer being used in Web APIs

third_party/WebKit/LayoutTests/fast/css/fontface-arraybuffer.html

Index: third_party/WebKit/LayoutTests/fast/css/fontface-arraybuffer.html
diff --git a/third_party/WebKit/LayoutTests/fast/css/fontface-arraybuffer.html b/third_party/WebKit/LayoutTests/fast/css/fontface-arraybuffer.html
index 1bbcd1ca8eaa93157ef681dcd7cc6e2b8e8b0d34..31457b629b2cabba57576ab22f5b49e9775b9f04 100644
--- a/third_party/WebKit/LayoutTests/fast/css/fontface-arraybuffer.html
+++ b/third_party/WebKit/LayoutTests/fast/css/fontface-arraybuffer.html
@@ -23,6 +23,16 @@ var face2 = new FontFace('FontFromArrayBufferView', uint8View);
 shouldBeEqualToString('face2.status', 'loaded');
 document.fonts.add(face2);
 
+if (window.SharedArrayBuffer) {
+    try {
+        new FontFace('FontFromSharedArrayBufferView',
+                     new Uint8Array(new SharedArrayBuffer(4)));
+    } catch (e) {
+        rejectionValue = e;
+        shouldBeEqualToString('rejectionValue.name', 'TypeError');
+    }
+}
+
 var face3 = new FontFace('FontFromEmptyArrayBuffer', new ArrayBuffer(0));
 shouldBeEqualToString('face3.status', 'error');
 face3.load().catch(function(v) {