Fix should() to throw with no argument

third_party/WebKit/LayoutTests/webaudio/resources/audit.js

Index: third_party/WebKit/LayoutTests/webaudio/resources/audit.js
diff --git a/third_party/WebKit/LayoutTests/webaudio/resources/audit.js b/third_party/WebKit/LayoutTests/webaudio/resources/audit.js
index f96e85e4036818a08ff57caaa7168aa985a24f85..7e732952a3968ed6ea2c9586d92c71a9b353ce83 100644
--- a/third_party/WebKit/LayoutTests/webaudio/resources/audit.js
+++ b/third_party/WebKit/LayoutTests/webaudio/resources/audit.js
@@ -951,6 +951,10 @@ window.Audit = (function () {
 
     // Start the assertion chain.
     should (actual, actualDescription) {
+      // If no argument is given, we cannot proceed. Halt.
+      if (arguments.length === 0)
+        _throwException('Task.should:: requires at least 1 argument.');
+
       return new Should(this, actual, actualDescription);
     }