Implement BaseAudioContext

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

Index: third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/AbstractAudioContext.cpp b/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp
similarity index 75%
rename from third_party/WebKit/Source/modules/webaudio/AbstractAudioContext.cpp
rename to third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp
index efd5cd17cfbee13f2019e419a358fa7e68b1be36..511c25db9ae51caad2f079596df4f4e3c04057df 100644
--- a/third_party/WebKit/Source/modules/webaudio/AbstractAudioContext.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp
@@ -22,7 +22,8 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "modules/webaudio/AbstractAudioContext.h"
+#include "modules/webaudio/BaseAudioContext.h"
+
 #include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
@@ -70,7 +71,7 @@
 
 namespace blink {
 
-AbstractAudioContext* AbstractAudioContext::create(Document& document, ExceptionState& exceptionState)
+BaseAudioContext* BaseAudioContext::create(Document& document, ExceptionState& exceptionState)
 {
     return AudioContext::create(document, exceptionState);
 }
@@ -79,7 +80,7 @@ AbstractAudioContext* AbstractAudioContext::create(Document& document, Exception
 // and OfflineAudioContext respectively.
 
 // Constructor for rendering to the audio hardware.
-AbstractAudioContext::AbstractAudioContext(Document* document)
+BaseAudioContext::BaseAudioContext(Document* document)
     : ActiveScriptWrappable(this)
     , ActiveDOMObject(document)
     , m_destinationNode(nullptr)
@@ -102,7 +103,7 @@ AbstractAudioContext::AbstractAudioContext(Document* document)
 }
 
 // Constructor for offline (non-realtime) rendering.
-AbstractAudioContext::AbstractAudioContext(Document* document, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
+BaseAudioContext::BaseAudioContext(Document* document, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
     : ActiveScriptWrappable(this)
     , ActiveDOMObject(document)
     , m_destinationNode(nullptr)
@@ -121,7 +122,7 @@ AbstractAudioContext::AbstractAudioContext(Document* document, unsigned numberOf
     m_didInitializeContextGraphMutex = true;
 }
 
-AbstractAudioContext::~AbstractAudioContext()
+BaseAudioContext::~BaseAudioContext()
 {
     deferredTaskHandler().contextWillBeDestroyed();
     // AudioNodes keep a reference to their context, so there should be no way to be in the destructor if there are still AudioNodes around.
@@ -132,7 +133,7 @@ AbstractAudioContext::~AbstractAudioContext()
     ASSERT(!m_resumeResolvers.size());
 }
 
-void AbstractAudioContext::initialize()
+void BaseAudioContext::initialize()
 {
     if (isDestinationInitialized())
         return;
@@ -145,7 +146,7 @@ void AbstractAudioContext::initialize()
     }
 }
 
-void AbstractAudioContext::clear()
+void BaseAudioContext::clear()
 {
     m_destinationNode.clear();
     // The audio rendering thread is dead.  Nobody will schedule AudioHandler
@@ -154,7 +155,7 @@ void AbstractAudioContext::clear()
     m_isCleared = true;
 }
 
-void AbstractAudioContext::uninitialize()
+void BaseAudioContext::uninitialize()
 {
     ASSERT(isMainThread());
 
@@ -178,23 +179,23 @@ void AbstractAudioContext::uninitialize()
     clear();
 }
 
-void AbstractAudioContext::stop()
+void BaseAudioContext::stop()
 {
     uninitialize();
 }
 
-bool AbstractAudioContext::hasPendingActivity() const
+bool BaseAudioContext::hasPendingActivity() const
 {
     // There's no pending activity if the audio context has been cleared.
     return !m_isCleared;
 }
 
-void AbstractAudioContext::throwExceptionForClosedState(ExceptionState& exceptionState)
+void BaseAudioContext::throwExceptionForClosedState(ExceptionState& exceptionState)
 {
     exceptionState.throwDOMException(InvalidStateError, "AudioContext has been closed.");
 }
 
-AudioBuffer* AbstractAudioContext::createBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState)
+AudioBuffer* BaseAudioContext::createBuffer(unsigned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState)
 {
     // It's ok to call createBuffer, even if the context is closed because the AudioBuffer doesn't
     // really "belong" to any particular context.
@@ -202,7 +203,7 @@ AudioBuffer* AbstractAudioContext::createBuffer(unsigned numberOfChannels, size_
     return AudioBuffer::create(numberOfChannels, numberOfFrames, sampleRate, exceptionState);
 }
 
-ScriptPromise AbstractAudioContext::decodeAudioData(ScriptState* scriptState, DOMArrayBuffer* audioData, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, ExceptionState& exceptionState)
+ScriptPromise BaseAudioContext::decodeAudioData(ScriptState* scriptState, DOMArrayBuffer* audioData, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     ASSERT(audioData);
@@ -220,7 +221,7 @@ ScriptPromise AbstractAudioContext::decodeAudioData(ScriptState* scriptState, DO
     return promise;
 }
 
-void AbstractAudioContext::handleDecodeAudioData(AudioBuffer* audioBuffer, ScriptPromiseResolver* resolver, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback)
+void BaseAudioContext::handleDecodeAudioData(AudioBuffer* audioBuffer, ScriptPromiseResolver* resolver, AudioBufferCallback* successCallback, AudioBufferCallback* errorCallback)
 {
     ASSERT(isMainThread());
 
@@ -242,7 +243,7 @@ void AbstractAudioContext::handleDecodeAudioData(AudioBuffer* audioBuffer, Scrip
     m_decodeAudioResolvers.remove(resolver);
 }
 
-AudioBufferSourceNode* AbstractAudioContext::createBufferSource(ExceptionState& exceptionState)
+AudioBufferSourceNode* BaseAudioContext::createBufferSource(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
 
@@ -259,90 +260,25 @@ AudioBufferSourceNode* AbstractAudioContext::createBufferSource(ExceptionState&
     return node;
 }
 
-MediaElementAudioSourceNode* AbstractAudioContext::createMediaElementSource(HTMLMediaElement* mediaElement, ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    // First check if this media element already has a source node.
-    if (mediaElement->audioSourceNode()) {
-        exceptionState.throwDOMException(
-            InvalidStateError,
-            "HTMLMediaElement already connected previously to a different MediaElementSourceNode.");
-        return nullptr;
-    }
-
-    MediaElementAudioSourceNode* node = MediaElementAudioSourceNode::create(*this, *mediaElement);
-
-    mediaElement->setAudioSourceNode(node);
-
-    notifySourceNodeStartedProcessing(node); // context keeps reference until node is disconnected
-    return node;
-}
-
-MediaStreamAudioSourceNode* AbstractAudioContext::createMediaStreamSource(MediaStream* mediaStream, ExceptionState& exceptionState)
-{
-    ASSERT(isMainThread());
-
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    MediaStreamTrackVector audioTracks = mediaStream->getAudioTracks();
-    if (audioTracks.isEmpty()) {
-        exceptionState.throwDOMException(
-            InvalidStateError,
-            "MediaStream has no audio track");
-        return nullptr;
-    }
-
-    // Use the first audio track in the media stream.
-    MediaStreamTrack* audioTrack = audioTracks[0];
-    OwnPtr<AudioSourceProvider> provider = audioTrack->createWebAudioSource();
-    MediaStreamAudioSourceNode* node = MediaStreamAudioSourceNode::create(*this, *mediaStream, audioTrack, provider.release());
-
-    // FIXME: Only stereo streams are supported right now. We should be able to accept multi-channel streams.
-    node->setFormat(2, sampleRate());
-
-    notifySourceNodeStartedProcessing(node); // context keeps reference until node is disconnected
-    return node;
-}
-
-MediaStreamAudioDestinationNode* AbstractAudioContext::createMediaStreamDestination(ExceptionState& exceptionState)
-{
-    if (isContextClosed()) {
-        throwExceptionForClosedState(exceptionState);
-        return nullptr;
-    }
-
-    // Set number of output channels to stereo by default.
-    return MediaStreamAudioDestinationNode::create(*this, 2);
-}
-
-ScriptProcessorNode* AbstractAudioContext::createScriptProcessor(ExceptionState& exceptionState)
+ScriptProcessorNode* BaseAudioContext::createScriptProcessor(ExceptionState& exceptionState)
 {
     // Set number of input/output channels to stereo by default.
     return createScriptProcessor(0, 2, 2, exceptionState);
 }
 
-ScriptProcessorNode* AbstractAudioContext::createScriptProcessor(size_t bufferSize, ExceptionState& exceptionState)
+ScriptProcessorNode* BaseAudioContext::createScriptProcessor(size_t bufferSize, ExceptionState& exceptionState)
 {
     // Set number of input/output channels to stereo by default.
     return createScriptProcessor(bufferSize, 2, 2, exceptionState);
 }
 
-ScriptProcessorNode* AbstractAudioContext::createScriptProcessor(size_t bufferSize, size_t numberOfInputChannels, ExceptionState& exceptionState)
+ScriptProcessorNode* BaseAudioContext::createScriptProcessor(size_t bufferSize, size_t numberOfInputChannels, ExceptionState& exceptionState)
 {
     // Set number of output channels to stereo by default.
     return createScriptProcessor(bufferSize, numberOfInputChannels, 2, exceptionState);
 }
 
-ScriptProcessorNode* AbstractAudioContext::createScriptProcessor(size_t bufferSize, size_t numberOfInputChannels, size_t numberOfOutputChannels, ExceptionState& exceptionState)
+ScriptProcessorNode* BaseAudioContext::createScriptProcessor(size_t bufferSize, size_t numberOfInputChannels, size_t numberOfOutputChannels, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
 
@@ -358,18 +294,18 @@ ScriptProcessorNode* AbstractAudioContext::createScriptProcessor(size_t bufferSi
             exceptionState.throwDOMException(
                 IndexSizeError,
                 "number of input channels and output channels cannot both be zero.");
-        } else if (numberOfInputChannels > AbstractAudioContext::maxNumberOfChannels()) {
+        } else if (numberOfInputChannels > BaseAudioContext::maxNumberOfChannels()) {
             exceptionState.throwDOMException(
                 IndexSizeError,
                 "number of input channels (" + String::number(numberOfInputChannels)
                 + ") exceeds maximum ("
-                + String::number(AbstractAudioContext::maxNumberOfChannels()) + ").");
-        } else if (numberOfOutputChannels > AbstractAudioContext::maxNumberOfChannels()) {
+                + String::number(BaseAudioContext::maxNumberOfChannels()) + ").");
+        } else if (numberOfOutputChannels > BaseAudioContext::maxNumberOfChannels()) {
             exceptionState.throwDOMException(
                 IndexSizeError,
                 "number of output channels (" + String::number(numberOfInputChannels)
                 + ") exceeds maximum ("
-                + String::number(AbstractAudioContext::maxNumberOfChannels()) + ").");
+                + String::number(BaseAudioContext::maxNumberOfChannels()) + ").");
         } else {
             exceptionState.throwDOMException(
                 IndexSizeError,
@@ -383,7 +319,7 @@ ScriptProcessorNode* AbstractAudioContext::createScriptProcessor(size_t bufferSi
     return node;
 }
 
-StereoPannerNode* AbstractAudioContext::createStereoPanner(ExceptionState& exceptionState)
+StereoPannerNode* BaseAudioContext::createStereoPanner(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
@@ -394,7 +330,7 @@ StereoPannerNode* AbstractAudioContext::createStereoPanner(ExceptionState& excep
     return StereoPannerNode::create(*this, sampleRate());
 }
 
-BiquadFilterNode* AbstractAudioContext::createBiquadFilter(ExceptionState& exceptionState)
+BiquadFilterNode* BaseAudioContext::createBiquadFilter(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
@@ -405,7 +341,7 @@ BiquadFilterNode* AbstractAudioContext::createBiquadFilter(ExceptionState& excep
     return BiquadFilterNode::create(*this, sampleRate());
 }
 
-WaveShaperNode* AbstractAudioContext::createWaveShaper(ExceptionState& exceptionState)
+WaveShaperNode* BaseAudioContext::createWaveShaper(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
@@ -416,7 +352,7 @@ WaveShaperNode* AbstractAudioContext::createWaveShaper(ExceptionState& exception
     return WaveShaperNode::create(*this);
 }
 
-PannerNode* AbstractAudioContext::createPanner(ExceptionState& exceptionState)
+PannerNode* BaseAudioContext::createPanner(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
@@ -427,7 +363,7 @@ PannerNode* AbstractAudioContext::createPanner(ExceptionState& exceptionState)
     return PannerNode::create(*this, sampleRate());
 }
 
-ConvolverNode* AbstractAudioContext::createConvolver(ExceptionState& exceptionState)
+ConvolverNode* BaseAudioContext::createConvolver(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
@@ -438,7 +374,7 @@ ConvolverNode* AbstractAudioContext::createConvolver(ExceptionState& exceptionSt
     return ConvolverNode::create(*this, sampleRate());
 }
 
-DynamicsCompressorNode* AbstractAudioContext::createDynamicsCompressor(ExceptionState& exceptionState)
+DynamicsCompressorNode* BaseAudioContext::createDynamicsCompressor(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
@@ -449,7 +385,7 @@ DynamicsCompressorNode* AbstractAudioContext::createDynamicsCompressor(Exception
     return DynamicsCompressorNode::create(*this, sampleRate());
 }
 
-AnalyserNode* AbstractAudioContext::createAnalyser(ExceptionState& exceptionState)
+AnalyserNode* BaseAudioContext::createAnalyser(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
@@ -460,7 +396,7 @@ AnalyserNode* AbstractAudioContext::createAnalyser(ExceptionState& exceptionStat
     return AnalyserNode::create(*this, sampleRate());
 }
 
-GainNode* AbstractAudioContext::createGain(ExceptionState& exceptionState)
+GainNode* BaseAudioContext::createGain(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
@@ -471,13 +407,13 @@ GainNode* AbstractAudioContext::createGain(ExceptionState& exceptionState)
     return GainNode::create(*this, sampleRate());
 }
 
-DelayNode* AbstractAudioContext::createDelay(ExceptionState& exceptionState)
+DelayNode* BaseAudioContext::createDelay(ExceptionState& exceptionState)
 {
     const double defaultMaxDelayTime = 1;
     return createDelay(defaultMaxDelayTime, exceptionState);
 }
 
-DelayNode* AbstractAudioContext::createDelay(double maxDelayTime, ExceptionState& exceptionState)
+DelayNode* BaseAudioContext::createDelay(double maxDelayTime, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
@@ -488,13 +424,13 @@ DelayNode* AbstractAudioContext::createDelay(double maxDelayTime, ExceptionState
     return DelayNode::create(*this, sampleRate(), maxDelayTime, exceptionState);
 }
 
-ChannelSplitterNode* AbstractAudioContext::createChannelSplitter(ExceptionState& exceptionState)
+ChannelSplitterNode* BaseAudioContext::createChannelSplitter(ExceptionState& exceptionState)
 {
     const unsigned ChannelSplitterDefaultNumberOfOutputs = 6;
     return createChannelSplitter(ChannelSplitterDefaultNumberOfOutputs, exceptionState);
 }
 
-ChannelSplitterNode* AbstractAudioContext::createChannelSplitter(size_t numberOfOutputs, ExceptionState& exceptionState)
+ChannelSplitterNode* BaseAudioContext::createChannelSplitter(size_t numberOfOutputs, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
 
@@ -510,20 +446,20 @@ ChannelSplitterNode* AbstractAudioContext::createChannelSplitter(size_t numberOf
             IndexSizeError,
             "number of outputs (" + String::number(numberOfOutputs)
             + ") must be between 1 and "
-            + String::number(AbstractAudioContext::maxNumberOfChannels()) + ".");
+            + String::number(BaseAudioContext::maxNumberOfChannels()) + ".");
         return nullptr;
     }
 
     return node;
 }
 
-ChannelMergerNode* AbstractAudioContext::createChannelMerger(ExceptionState& exceptionState)
+ChannelMergerNode* BaseAudioContext::createChannelMerger(ExceptionState& exceptionState)
 {
     const unsigned ChannelMergerDefaultNumberOfInputs = 6;
     return createChannelMerger(ChannelMergerDefaultNumberOfInputs, exceptionState);
 }
 
-ChannelMergerNode* AbstractAudioContext::createChannelMerger(size_t numberOfInputs, ExceptionState& exceptionState)
+ChannelMergerNode* BaseAudioContext::createChannelMerger(size_t numberOfInputs, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
@@ -541,7 +477,7 @@ ChannelMergerNode* AbstractAudioContext::createChannelMerger(size_t numberOfInpu
                 numberOfInputs,
                 1,
                 ExceptionMessages::InclusiveBound,
-                AbstractAudioContext::maxNumberOfChannels(),
+                BaseAudioContext::maxNumberOfChannels(),
                 ExceptionMessages::InclusiveBound));
         return nullptr;
     }
@@ -549,7 +485,7 @@ ChannelMergerNode* AbstractAudioContext::createChannelMerger(size_t numberOfInpu
     return node;
 }
 
-OscillatorNode* AbstractAudioContext::createOscillator(ExceptionState& exceptionState)
+OscillatorNode* BaseAudioContext::createOscillator(ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     if (isContextClosed()) {
@@ -565,12 +501,12 @@ OscillatorNode* AbstractAudioContext::createOscillator(ExceptionState& exception
     return node;
 }
 
-PeriodicWave* AbstractAudioContext::createPeriodicWave(DOMFloat32Array* real, DOMFloat32Array* imag, ExceptionState& exceptionState)
+PeriodicWave* BaseAudioContext::createPeriodicWave(DOMFloat32Array* real, DOMFloat32Array* imag, ExceptionState& exceptionState)
 {
     return PeriodicWave::create(sampleRate(), real, imag, false);
 }
 
-PeriodicWave* AbstractAudioContext::createPeriodicWave(DOMFloat32Array* real, DOMFloat32Array* imag, const Dictionary& options, ExceptionState& exceptionState)
+PeriodicWave* BaseAudioContext::createPeriodicWave(DOMFloat32Array* real, DOMFloat32Array* imag, const Dictionary& options, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
 
@@ -594,7 +530,7 @@ PeriodicWave* AbstractAudioContext::createPeriodicWave(DOMFloat32Array* real, DO
     return PeriodicWave::create(sampleRate(), real, imag, isNormalizationDisabled);
 }
 
-IIRFilterNode* AbstractAudioContext::createIIRFilter(Vector<double> feedforwardCoef, Vector<double> feedbackCoef,  ExceptionState& exceptionState)
+IIRFilterNode* BaseAudioContext::createIIRFilter(Vector<double> feedforwardCoef, Vector<double> feedbackCoef,  ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
 
@@ -678,7 +614,7 @@ IIRFilterNode* AbstractAudioContext::createIIRFilter(Vector<double> feedforwardC
     return IIRFilterNode::create(*this, sampleRate(), feedforwardCoef, feedbackCoef);
 }
 
-PeriodicWave* AbstractAudioContext::periodicWave(int type)
+PeriodicWave* BaseAudioContext::periodicWave(int type)
 {
     switch (type) {
     case OscillatorHandler::SINE:
@@ -707,7 +643,7 @@ PeriodicWave* AbstractAudioContext::periodicWave(int type)
     }
 }
 
-String AbstractAudioContext::state() const
+String BaseAudioContext::state() const
 {
     // These strings had better match the strings for AudioContextState in AudioContext.idl.
     switch (m_contextState) {
@@ -722,7 +658,7 @@ String AbstractAudioContext::state() const
     return "";
 }
 
-void AbstractAudioContext::setContextState(AudioContextState newState)
+void BaseAudioContext::setContextState(AudioContextState newState)
 {
     ASSERT(isMainThread());
 
@@ -749,21 +685,21 @@ void AbstractAudioContext::setContextState(AudioContextState newState)
 
     // Notify context that state changed
     if (getExecutionContext())
-        getExecutionContext()->postTask(BLINK_FROM_HERE, createSameThreadTask(&AbstractAudioContext::notifyStateChange, this));
+        getExecutionContext()->postTask(BLINK_FROM_HERE, createSameThreadTask(&BaseAudioContext::notifyStateChange, this));
 }
 
-void AbstractAudioContext::notifyStateChange()
+void BaseAudioContext::notifyStateChange()
 {
     dispatchEvent(Event::create(EventTypeNames::statechange));
 }
 
-void AbstractAudioContext::notifySourceNodeFinishedProcessing(AudioHandler* handler)
+void BaseAudioContext::notifySourceNodeFinishedProcessing(AudioHandler* handler)
 {
     ASSERT(isAudioThread());
     m_finishedSourceHandlers.append(handler);
 }
 
-void AbstractAudioContext::releaseFinishedSourceNodes()
+void BaseAudioContext::releaseFinishedSourceNodes()
 {
     ASSERT(isGraphOwner());
     ASSERT(isAudioThread());
@@ -780,7 +716,7 @@ void AbstractAudioContext::releaseFinishedSourceNodes()
     m_finishedSourceHandlers.clear();
 }
 
-void AbstractAudioContext::notifySourceNodeStartedProcessing(AudioNode* node)
+void BaseAudioContext::notifySourceNodeStartedProcessing(AudioNode* node)
 {
     ASSERT(isMainThread());
     AutoLocker locker(this);
@@ -789,7 +725,7 @@ void AbstractAudioContext::notifySourceNodeStartedProcessing(AudioNode* node)
     node->handler().makeConnection();
 }
 
-void AbstractAudioContext::releaseActiveSourceNodes()
+void BaseAudioContext::releaseActiveSourceNodes()
 {
     ASSERT(isMainThread());
     for (auto& sourceNode : m_activeSourceNodes)
@@ -798,7 +734,7 @@ void AbstractAudioContext::releaseActiveSourceNodes()
     m_activeSourceNodes.clear();
 }
 
-void AbstractAudioContext::handleStoppableSourceNodes()
+void BaseAudioContext::handleStoppableSourceNodes()
 {
     ASSERT(isGraphOwner());
 
@@ -811,7 +747,7 @@ void AbstractAudioContext::handleStoppableSourceNodes()
     }
 }
 
-void AbstractAudioContext::handlePreRenderTasks()
+void BaseAudioContext::handlePreRenderTasks()
 {
     ASSERT(isAudioThread());
 
@@ -829,7 +765,7 @@ void AbstractAudioContext::handlePreRenderTasks()
     }
 }
 
-void AbstractAudioContext::handlePostRenderTasks()
+void BaseAudioContext::handlePostRenderTasks()
 {
     ASSERT(isAudioThread());
 
@@ -850,7 +786,7 @@ void AbstractAudioContext::handlePostRenderTasks()
     }
 }
 
-void AbstractAudioContext::resolvePromisesForResumeOnMainThread()
+void BaseAudioContext::resolvePromisesForResumeOnMainThread()
 {
     ASSERT(isMainThread());
     AutoLocker locker(this);
@@ -868,9 +804,9 @@ void AbstractAudioContext::resolvePromisesForResumeOnMainThread()
     m_isResolvingResumePromises = false;
 }
 
-void AbstractAudioContext::resolvePromisesForResume()
+void BaseAudioContext::resolvePromisesForResume()
 {
-    // This runs inside the AbstractAudioContext's lock when handling pre-render tasks.
+    // This runs inside the BaseAudioContext's lock when handling pre-render tasks.
     ASSERT(isAudioThread());
     ASSERT(isGraphOwner());
 
@@ -879,11 +815,11 @@ void AbstractAudioContext::resolvePromisesForResume()
     // promises in the main thread.
     if (!m_isResolvingResumePromises && m_resumeResolvers.size() > 0) {
         m_isResolvingResumePromises = true;
-        Platform::current()->mainThread()->getWebTaskRunner()->postTask(BLINK_FROM_HERE, threadSafeBind(&AbstractAudioContext::resolvePromisesForResumeOnMainThread, this));
+        Platform::current()->mainThread()->getWebTaskRunner()->postTask(BLINK_FROM_HERE, threadSafeBind(&BaseAudioContext::resolvePromisesForResumeOnMainThread, this));
     }
 }
 
-void AbstractAudioContext::rejectPendingResolvers()
+void BaseAudioContext::rejectPendingResolvers()
 {
     ASSERT(isMainThread());
 
@@ -901,17 +837,17 @@ void AbstractAudioContext::rejectPendingResolvers()
     m_decodeAudioResolvers.clear();
 }
 
-const AtomicString& AbstractAudioContext::interfaceName() const
+const AtomicString& BaseAudioContext::interfaceName() const
 {
     return EventTargetNames::AudioContext;
 }
 
-ExecutionContext* AbstractAudioContext::getExecutionContext() const
+ExecutionContext* BaseAudioContext::getExecutionContext() const
 {
     return ActiveDOMObject::getExecutionContext();
 }
 
-void AbstractAudioContext::startRendering()
+void BaseAudioContext::startRendering()
 {
     // This is called for both online and offline contexts.
     ASSERT(isMainThread());
@@ -923,11 +859,11 @@ void AbstractAudioContext::startRendering()
     }
 }
 
-DEFINE_TRACE(AbstractAudioContext)
+DEFINE_TRACE(BaseAudioContext)
 {
     visitor->trace(m_destinationNode);
     visitor->trace(m_listener);
-    // trace() can be called in AbstractAudioContext constructor, and
+    // trace() can be called in BaseAudioContext constructor, and
     // m_contextGraphMutex might be unavailable.
     if (m_didInitializeContextGraphMutex) {
         AutoLocker lock(this);
@@ -942,11 +878,11 @@ DEFINE_TRACE(AbstractAudioContext)
     visitor->trace(m_periodicWaveSquare);
     visitor->trace(m_periodicWaveSawtooth);
     visitor->trace(m_periodicWaveTriangle);
-    RefCountedGarbageCollectedEventTargetWithInlineData<AbstractAudioContext>::trace(visitor);
+    RefCountedGarbageCollectedEventTargetWithInlineData<BaseAudioContext>::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
-SecurityOrigin* AbstractAudioContext::getSecurityOrigin() const
+SecurityOrigin* BaseAudioContext::getSecurityOrigin() const
 {
     if (getExecutionContext())
         return getExecutionContext()->getSecurityOrigin();