[tests] Convert a detached typed array to a null string

third_party/WebKit/LayoutTests/fast/dom/Window/window-postmessage-args-expected.txt

Index: third_party/WebKit/LayoutTests/fast/dom/Window/window-postmessage-args-expected.txt
diff --git a/third_party/WebKit/LayoutTests/fast/dom/Window/window-postmessage-args-expected.txt b/third_party/WebKit/LayoutTests/fast/dom/Window/window-postmessage-args-expected.txt
index f7af080c480568e30ab18809c1a61bca530384f5..7a58fc78700028cba60963a4c541effbedf14b31 100644
--- a/third_party/WebKit/LayoutTests/fast/dom/Window/window-postmessage-args-expected.txt
+++ b/third_party/WebKit/LayoutTests/fast/dom/Window/window-postmessage-args-expected.txt
@@ -22,8 +22,8 @@ PASS arrayBuffer neutered
 PASS view neutered
 PASS Posting message ('[object ArrayBuffer]', ): threw exception DataCloneError: Failed to execute 'postMessage' on 'Window': An ArrayBuffer is neutered and could not be cloned.
 PASS Posting message ('data', [object ArrayBuffer]): threw exception DataCloneError: Failed to execute 'postMessage' on 'Window': ArrayBuffer at index 0 is already neutered.
-PASS Posting message ('', ): threw exception DataCloneError: Failed to execute 'postMessage' on 'Window': An ArrayBuffer is neutered and could not be cloned.
-PASS Posting message ('data', ): threw exception TypeError: Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type.
+PASS Posting message ('[detached TypedArray]', ): threw exception DataCloneError: Failed to execute 'postMessage' on 'Window': An ArrayBuffer is neutered and could not be cloned.
+PASS Posting message ('data', [detached TypedArray]): threw exception TypeError: Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type.
 PASS Posting message ('data', [object Object]): threw exception TypeError: Failed to execute 'postMessage' on 'Window': Value at index 0 is an untransferable 'undefined' value.
 PASS Posting message ('data', 1,,2): threw exception TypeError: Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type.
 PASS Posting message ('data', ,function () { [native code] }): threw exception TypeError: Failed to execute 'postMessage' on 'Window': Value at index 0 is an untransferable 'null' value.