Implement tail processing for AudioNodes

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

Index: third_party/WebKit/Source/modules/webaudio/AnalyserNode.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/AnalyserNode.cpp b/third_party/WebKit/Source/modules/webaudio/AnalyserNode.cpp
index dddafd58d068e0170bedc8b1b9e4c10af2d68e5b..580753a254a802872c9044e36c45530e1ca12e42 100644
--- a/third_party/WebKit/Source/modules/webaudio/AnalyserNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/AnalyserNode.cpp
@@ -172,6 +172,15 @@ void AnalyserHandler::UpdatePullStatus() {
     }
   }
 }
+
+bool AnalyserHandler::RequiresTailProcessing() const {
+  // Tail time is always non-zero so tail processing is required.
+  return true;
+}
+
+double AnalyserHandler::TailTime() const {
+  return 32768 / static_cast<double>(Context()->sampleRate());
+};
 // ----------------------------------------------------------------
 
 AnalyserNode::AnalyserNode(BaseAudioContext& context)