Implement tail processing for AudioNodes

third_party/WebKit/Source/platform/audio/DynamicsCompressor.h

Index: third_party/WebKit/Source/platform/audio/DynamicsCompressor.h
diff --git a/third_party/WebKit/Source/platform/audio/DynamicsCompressor.h b/third_party/WebKit/Source/platform/audio/DynamicsCompressor.h
index 13f0a87559a2a16d6f9ef5efb13f5e7394600c38..119b6daabef2c3982b3bbb42c040e4ad0e87a45b 100644
--- a/third_party/WebKit/Source/platform/audio/DynamicsCompressor.h
+++ b/third_party/WebKit/Source/platform/audio/DynamicsCompressor.h
@@ -83,10 +83,15 @@ class PLATFORM_EXPORT DynamicsCompressor {
   float SampleRate() const { return sample_rate_; }
   float Nyquist() const { return sample_rate_ / 2; }
 
-  double TailTime() const { return 0; }
+  double TailTime() const;
   double LatencyTime() const {
     return compressor_.LatencyFrames() / static_cast<double>(SampleRate());
   }
+  bool RequiresTailProcessing() const {
+    // Always return true even if the tail time and latency might both
+    // be zero.
+    return true;
+  }
 
  protected:
   unsigned number_of_channels_;