Continue to process AnalyserNode if inputs are silent.

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

Index: third_party/WebKit/Source/modules/webaudio/AnalyserNode.h
diff --git a/third_party/WebKit/Source/modules/webaudio/AnalyserNode.h b/third_party/WebKit/Source/modules/webaudio/AnalyserNode.h
index 6c80967316f6ae626f740f60e3d65b1923d5e0e8..7e7a5f4886dec7e6e02e2e88fcd148f2260b79ea 100644
--- a/third_party/WebKit/Source/modules/webaudio/AnalyserNode.h
+++ b/third_party/WebKit/Source/modules/webaudio/AnalyserNode.h
@@ -77,6 +77,12 @@ class AnalyserHandler final : public AudioBasicInspectorHandler {
 
  private:
   AnalyserHandler(AudioNode&, float sampleRate);
+  bool propagatesSilence() const {
+    // An AnalyserNode does actually propogate silence, but to get the
+    // time and FFT data updated correctly, process() needs to be
+    // called even if all the inputs are silent.
+    return false;
+  }
 
   RealtimeAnalyser m_analyser;
 };