[SharedArrayBuffer] Prevent SharedArrayBuffer being used in Web APIs

third_party/WebKit/LayoutTests/fast/files/blob-constructor.html

Index: third_party/WebKit/LayoutTests/fast/files/blob-constructor.html
diff --git a/third_party/WebKit/LayoutTests/fast/files/blob-constructor.html b/third_party/WebKit/LayoutTests/fast/files/blob-constructor.html
index 5261d19ff472233378cc26b2fdd4c7469f3729df..df34b9cd2bb8a728c2ea63e433bf538128942e61 100644
--- a/third_party/WebKit/LayoutTests/fast/files/blob-constructor.html
+++ b/third_party/WebKit/LayoutTests/fast/files/blob-constructor.html
@@ -123,6 +123,11 @@ shouldBe("new Blob([(new Float64Array(100)).buffer]).size", "800");
 shouldBe("new Blob([(new Float64Array(100)).buffer, (new Int32Array(100)).buffer, (new Uint8Array(100)).buffer, (new DataView(new ArrayBuffer(100))).buffer]).size", "1400");
 shouldBe("new Blob([new Blob([(new Int32Array(100)).buffer]), (new Uint8Array(100)).buffer, (new Float32Array(100)).buffer, (new DataView(new ArrayBuffer(100))).buffer]).size", "1000");
 
+if (window.SharedArrayBuffer) {
+  // Test SharedArrayBuffer parameters.
+  shouldThrow("new Blob([new Uint8Array(new SharedArrayBuffer(4))])", '"TypeError: Failed to construct \'Blob\': The provided ArrayBufferView value must not be shared."');
+}
+
 // Test passing blob parts in objects with indexed properties.
 // (This depends on the bindings code handling of sequence<T>)
 shouldBe("new Blob({length: 0}).size", "0");