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..dda3cb4dc4dedfcf77dec81308284aec227790e5
--- /dev/null
+++ b/third_party/WebKit/Source/modules/webaudio/AudioContextOptions.idl
@@ -0,0 +1,8 @@
+// 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.
+
+// See https://webaudio.github.io/web-audio-api/#audiocontextoptions
+dictionary AudioContextOptions {
+    AudioContextLatencyCategory latencyHint = "interactive";

[Raymond Toy, 2016/11/30 21:50:27]

Although you're not implementing the double value part yet, I think we should
define this correctly now instead of later.  For the implementation, we can just
treat float value as being the same as interactive, until it's supported.

WDYT?

[Andrew MacPherson, 2016/12/01 12:11:56]

Makes sense, I have added this now though I had to add an unnecessary typedef
for the type as it didn't seem to generate the
AudioContextLatencyCategoryOrDouble otherwise. I looked at other examples of
this kind of thing to figure out the typedef workaround. 

+};