Support for AudioContextOptions latencyHint.

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

Index: third_party/WebKit/Source/modules/webaudio/MediaStreamAudioSourceNode.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/MediaStreamAudioSourceNode.cpp b/third_party/WebKit/Source/modules/webaudio/MediaStreamAudioSourceNode.cpp
index 2c69eeedfc7cbf1eadc5c7d99cd89d99320ce3f6..04e14ae08945bcb6e03762a499a4dd7f46c6cde5 100644
--- a/third_party/WebKit/Source/modules/webaudio/MediaStreamAudioSourceNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/MediaStreamAudioSourceNode.cpp
@@ -69,11 +69,11 @@ MediaStreamAudioSourceHandler::~MediaStreamAudioSourceHandler() {
 void MediaStreamAudioSourceHandler::setFormat(size_t numberOfChannels,
                                               float sourceSampleRate) {
   if (numberOfChannels != m_sourceNumberOfChannels ||
-      sourceSampleRate != sampleRate()) {
+      sourceSampleRate != context()->sampleRate()) {
     // The sample-rate must be equal to the context's sample-rate.
     if (!numberOfChannels ||
         numberOfChannels > BaseAudioContext::maxNumberOfChannels() ||
-        sourceSampleRate != sampleRate()) {
+        sourceSampleRate != context()->sampleRate()) {
       // process() will generate silence for these uninitialized values.
       DLOG(ERROR) << "setFormat(" << numberOfChannels << ", "
                   << sourceSampleRate << ") - unhandled format change";