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 900ff22c283d102ac3df0e3c25c321ab9442c380..a83ad8a0042c242a50b3ac384087e1e05eb993c2 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"
@@ -328,6 +329,13 @@ AudioBufferSourceNode* BaseAudioContext::createBufferSource(
   return node;
 }
 
+ConstantSourceNode* BaseAudioContext::createConstantSource(
+    ExceptionState& exceptionState) {
+  DCHECK(isMainThread());
+
+  return ConstantSourceNode::create(*this, exceptionState);
+}
+
 MediaElementAudioSourceNode* BaseAudioContext::createMediaElementSource(
     HTMLMediaElement* mediaElement,
     ExceptionState& exceptionState) {