https://bugs.webkit.org/show_bug.cgi?id=127254

Reviewed by Andreas Kling.

Instead use std::mutex and std::unique_lock with the std::try_to_lock constructor.

* Modules/webaudio/AudioBufferSourceNode.cpp:
(WebCore::AudioBufferSourceNode::process):
(WebCore::AudioBufferSourceNode::setBuffer):
* Modules/webaudio/AudioBufferSourceNode.h:
* Modules/webaudio/AudioParamTimeline.cpp:
(WebCore::AudioParamTimeline::insertEvent):
(WebCore::AudioParamTimeline::cancelScheduledValues):
(WebCore::AudioParamTimeline::valueForContextTime):
(WebCore::AudioParamTimeline::valuesForTimeRange):
(WebCore::AudioParamTimeline::valuesForTimeRangeImpl):
* Modules/webaudio/AudioParamTimeline.h:
* Modules/webaudio/ConvolverNode.cpp:
(WebCore::ConvolverNode::process):
(WebCore::ConvolverNode::reset):
(WebCore::ConvolverNode::setBuffer):
* Modules/webaudio/ConvolverNode.h:
* Modules/webaudio/MediaElementAudioSourceNode.cpp:
(WebCore::MediaElementAudioSourceNode::setFormat):
(WebCore::MediaElementAudioSourceNode::process):
(WebCore::MediaElementAudioSourceNode::lock):
(WebCore::MediaElementAudioSourceNode::unlock):
* Modules/webaudio/MediaElementAudioSourceNode.h:
* Modules/webaudio/MediaStreamAudioSourceNode.cpp:
(WebCore::MediaStreamAudioSourceNode::setFormat):
(WebCore::MediaStreamAudioSourceNode::process):
* Modules/webaudio/MediaStreamAudioSourceNode.h:
* Modules/webaudio/OscillatorNode.cpp:
(WebCore::OscillatorNode::process):
(WebCore::OscillatorNode::setPeriodicWave):
* Modules/webaudio/OscillatorNode.h:
* Modules/webaudio/PannerNode.cpp:
(WebCore::PannerNode::process):
(WebCore::PannerNode::setPanningModel):
* Modules/webaudio/PannerNode.h:
* Modules/webaudio/WaveShaperProcessor.cpp:
(WebCore::WaveShaperProcessor::setCurve):
(WebCore::WaveShaperProcessor::setOversample):
(WebCore::WaveShaperProcessor::process):
* Modules/webaudio/WaveShaperProcessor.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@162296 268f45cc-cd09-0410-ab3c-d52691b4dbfc