Make DOMArrayBuffer::Transfer neuter v8::ArrayBuffers

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 d58dd559ce6a1a4871c576f3b48cb98b926b381f..fd5b34af1c88ff68a20c64d87cb28ed6a46e324a 100644
--- a/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.cpp
@@ -285,25 +285,34 @@ ScriptPromise BaseAudioContext::decodeAudioData(
 
   DCHECK_GT(rate, 0);
 
-  if (audio_data->IsNeutered()) {
+  DOMException* error = nullptr;
+  v8::Isolate* isolate = script_state->GetIsolate();
+  if (audio_data->IsNeuterable(isolate)) {
+    // Detach the audio array buffer from the main thread and start
+    // async decoding of the data.
+    WTF::ArrayBufferContents buffer_contents;
+    if (audio_data->Transfer(isolate, buffer_contents)) {
+      DOMArrayBuffer* audio = DOMArrayBuffer::Create(buffer_contents);
+
+      decode_audio_resolvers_.insert(resolver);
+      audio_decoder_.DecodeAsync(audio, rate, success_callback, error_callback,
+                                 resolver, this);
+    } else {
+      error =
+          DOMException::Create(kDataCloneError, "Cannot transfer ArrayBuffer");
+    }
+  } else {
     // If audioData is detached (neutered) we need to reject the
     // promise with an error.
-    DOMException* error = DOMException::Create(
-        kDataCloneError, "Cannot decode detached ArrayBuffer");
+    error = DOMException::Create(kDataCloneError,
+                                 "Cannot decode detached ArrayBuffer");
+  }
+
+  if (error) {
     resolver->Reject(error);
     if (error_callback) {
       error_callback->handleEvent(error);
     }
-  } else {
-    // Detach the audio array buffer from the main thread and start
-    // async decoding of the data.
-    WTF::ArrayBufferContents buffer_contents;
-    audio_data->Transfer(buffer_contents);
-    DOMArrayBuffer* audio = DOMArrayBuffer::Create(buffer_contents);
-
-    decode_audio_resolvers_.insert(resolver);
-    audio_decoder_.DecodeAsync(audio, rate, success_callback, error_callback,
-                               resolver, this);
   }
 
   return promise;