Make AudioBufferSourceNode.buffer setter conforming

third_party/WebKit/Source/modules/webaudio/AudioBufferSourceNode.h

Index: third_party/WebKit/Source/modules/webaudio/AudioBufferSourceNode.h
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioBufferSourceNode.h b/third_party/WebKit/Source/modules/webaudio/AudioBufferSourceNode.h
index 5cc78d303eee243a5e7321ec1949179fbe437460..22cb1142cd5f827a6c072efe2a1740693a4330b5 100644
--- a/third_party/WebKit/Source/modules/webaudio/AudioBufferSourceNode.h
+++ b/third_party/WebKit/Source/modules/webaudio/AudioBufferSourceNode.h
@@ -180,6 +180,10 @@ class AudioBufferSourceHandler final : public AudioScheduledSourceHandler {
   // TODO: when the codebase adopts std::atomic<>, use it for
   // |min_playback_rate_|.
   Mutex min_playback_rate_mutex_;
+
+  // True if the |buffer| attribute has ever been set to a non-null
+  // value.  Defaults to false.
+  bool buffer_has_been_set_;

[hongchan, 2017/07/28 18:45:32]

Add ` = false;` and remove the comment about the default value.

[Raymond Toy, 2017/07/28 19:16:55]

The constructor needs to initialize other things, so I find it very convenient
to initialize everything there, even if we could initialize it somewhere else. 
One less file to look at.

 };
 
 class AudioBufferSourceNode final : public AudioScheduledSourceNode {