Implement ConstantSourceNode

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/BaseAudioContext.cpp b/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp
index cb83b9a35728164a9ca67af4e53409db1ed868a5..b9d281fe96eee082f93fb253e87e46f6350babcf 100644
--- a/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp
@@ -50,6 +50,7 @@
 #include "modules/webaudio/BiquadFilterNode.h"
 #include "modules/webaudio/ChannelMergerNode.h"
 #include "modules/webaudio/ChannelSplitterNode.h"
+#include "modules/webaudio/ConstantSourceNode.h"
 #include "modules/webaudio/ConvolverNode.h"
 #include "modules/webaudio/DefaultAudioDestinationNode.h"
 #include "modules/webaudio/DelayNode.h"
@@ -327,6 +328,13 @@ AudioBufferSourceNode* BaseAudioContext::createBufferSource(
   return node;
 }
 
+ConstantSourceNode* BaseAudioContext::createConstantSource(
+    ExceptionState& exceptionState) {
+  DCHECK(isMainThread());
+
+  return ConstantSourceNode::create(*this, exceptionState);
+}
+
 MediaElementAudioSourceNode* BaseAudioContext::createMediaElementSource(
     HTMLMediaElement* mediaElement,
     ExceptionState& exceptionState) {