Support for AudioContextOptions latencyHint.

third_party/WebKit/Source/modules/webaudio/AudioContextOptions.idl

Index: third_party/WebKit/Source/modules/webaudio/AudioContextOptions.idl
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioContextOptions.idl b/third_party/WebKit/Source/modules/webaudio/AudioContextOptions.idl
new file mode 100644
index 0000000000000000000000000000000000000000..864d79e458ee239ca61c279fa05bf1715d87e4a6
--- /dev/null
+++ b/third_party/WebKit/Source/modules/webaudio/AudioContextOptions.idl
@@ -0,0 +1,10 @@
+// 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.
+
+typedef (AudioContextLatencyCategory or double) AudioContextLatencyHint;
+
+// See https://webaudio.github.io/web-audio-api/#audiocontextoptions
+dictionary AudioContextOptions {
+    AudioContextLatencyHint latencyHint = "interactive";
+};