WebAudio: record whether user gesture was available and provided.

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

Index: third_party/WebKit/Source/modules/webaudio/AudioScheduledSourceNode.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioScheduledSourceNode.cpp b/third_party/WebKit/Source/modules/webaudio/AudioScheduledSourceNode.cpp
index 5123b3df5f321dd72d2c3454fb05867fb25250bd..8e479f52ae2849ed62385b5d9384d36b28c58a8e 100644
--- a/third_party/WebKit/Source/modules/webaudio/AudioScheduledSourceNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/AudioScheduledSourceNode.cpp
@@ -132,6 +132,8 @@ void AudioScheduledSourceHandler::start(double when, ExceptionState& exceptionSt
 {
     ASSERT(isMainThread());
 
+    context()->recordUserGestureState();
+
     if (playbackState() != UNSCHEDULED_STATE) {
         exceptionState.throwDOMException(
             InvalidStateError,
@@ -277,4 +279,3 @@ bool AudioScheduledSourceNode::hasPendingActivity() const
 }
 
 } // namespace blink
-