Add options.omitErrorMessage for should.throw()

third_party/WebKit/LayoutTests/webaudio/dom-exceptions.html

Index: third_party/WebKit/LayoutTests/webaudio/dom-exceptions.html
diff --git a/third_party/WebKit/LayoutTests/webaudio/dom-exceptions.html b/third_party/WebKit/LayoutTests/webaudio/dom-exceptions.html
index 7991159c216cedd8b1180361f322a15b1c24b321..436fd83a6d1ab9914885b63121b0b60a96aa2524 100644
--- a/third_party/WebKit/LayoutTests/webaudio/dom-exceptions.html
+++ b/third_party/WebKit/LayoutTests/webaudio/dom-exceptions.html
@@ -323,7 +323,7 @@ audit.define(
       should(
           () => context.destination.channelCount = 99,
           'context.destination.channelCount = 99')
-          .throw('IndexSizeError');
+          .throw('IndexSizeError', { omitErrorMessage: true });
 
       task.done();
     });