Roll 50: Copied IDLs, PYTHON scripts from WebKit removed deleted files in WebCore

modules/webaudio/IIRFilterNode.idl

Index: modules/webaudio/IIRFilterNode.idl
diff --git a/modules/webaudio/IIRFilterNode.idl b/modules/webaudio/IIRFilterNode.idl
new file mode 100644
index 0000000000000000000000000000000000000000..313e5162fc0f625de09d71e468c35dc21bbecdda
--- /dev/null
+++ b/modules/webaudio/IIRFilterNode.idl
@@ -0,0 +1,9 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+interface IIRFilterNode : AudioNode {
+    [RaisesException] void getFrequencyResponse(Float32Array frequencyHz,
+                                                Float32Array magResponse,
+                                                Float32Array phaseResponse);
+};