Support for AudioContextOptions latencyHint.

third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.cpp

Index: third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.cpp b/third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.cpp
index 78eeb8ced6c5b85f712aabcab8f7e35e8b57d497..a5ab262f03642044613c211b45656b1541cf5cdf 100644
--- a/third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.cpp
@@ -33,10 +33,8 @@
 
 namespace blink {
 
-AudioDestinationHandler::AudioDestinationHandler(AudioNode& node,
-                                                 float sampleRate)
-    : AudioHandler(NodeTypeDestination, node, sampleRate),
-      m_currentSampleFrame(0) {
+AudioDestinationHandler::AudioDestinationHandler(AudioNode& node)
+    : AudioHandler(NodeTypeDestination, node, 0), m_currentSampleFrame(0) {

[hongchan, 2016/12/02 17:40:12]

So the initial sample rate is zero? Not sure why this change is necessary here.

[Andrew MacPherson, 2016/12/05 14:12:53]

I mentioned in an earlier comment to rtoy@ that the sample rate passed into the
AudioHandler() constructor is no longer used anywhere and should be removed but
I wasn't sure if I should include that as part of this CL since it touches a
number of files in the webaudio code. I'm happy to take care of it right now
though if that's best!

   addInput();
 }