AudioBuffer numberOfChannels defaults to 1

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

Index: third_party/WebKit/Source/modules/webaudio/AudioBuffer.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioBuffer.cpp b/third_party/WebKit/Source/modules/webaudio/AudioBuffer.cpp
index 1eab6e67412f7b93ee911bec2fa05fd7face72d0..fe8639de114c368b583aa512b1ef4d1a93c2bb5e 100644
--- a/third_party/WebKit/Source/modules/webaudio/AudioBuffer.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/AudioBuffer.cpp
@@ -116,12 +116,6 @@ AudioBuffer* AudioBuffer::create(BaseAudioContext* context,
     return nullptr;
   }
 
-  if (!options.hasLength()) {
-    exceptionState.throwDOMException(NotFoundError,
-                                     "AudioBufferOptions: length is required.");
-    return nullptr;
-  }
-
   numberOfChannels = options.numberOfChannels();
   numberOfFrames = options.length();