WaveShaperNode should copy its curve.

third_party/WebKit/LayoutTests/webaudio/resources/audio-testing.js

Index: third_party/WebKit/LayoutTests/webaudio/resources/audio-testing.js
diff --git a/third_party/WebKit/LayoutTests/webaudio/resources/audio-testing.js b/third_party/WebKit/LayoutTests/webaudio/resources/audio-testing.js
index 09f2bf7081920d1f4bb9b6ebfb742a810dd2233c..88fdb2530cd7adad3f940da9466f2c4d58dcbbf8 100644
--- a/third_party/WebKit/LayoutTests/webaudio/resources/audio-testing.js
+++ b/third_party/WebKit/LayoutTests/webaudio/resources/audio-testing.js
@@ -1138,6 +1138,32 @@ var Should = (function () {
         }.bind(this));
     };
 
+    // Check if the target is null
+    //
+    // Example:
+    // Should("Value", value).beNull();
+    // Result:
+    // "PASS Value is null."
+    // "FAIL value is not null."
+    ShouldModel.prototype.beNull = function () {

[Raymond Toy, 2016/08/08 21:24:37]

Maybe we don't want this and have the user use beEqualTo (once that is made to
accept booleans).

+        if (this.target === null)
+            this._testPassed("is null");
+        else
+            this._testFailed("is not null");
+
+        return this._success;
+    }
+
+    // The opposite of beNull().
+    ShouldModel.prototype.notBeNull = function () {
+        if (this.target === null)
+            this._testFailed("is null");
+        else
+            this._testPassed("is not null");
+
+        return this._success;
+    }
+
     // Should() method.
     //
     // |desc| is the description of the task or check and |target| is a value