Remove ASSERT_NOT_REACHED() in audio.

third_party/WebKit/Source/platform/audio/Panner.cpp

Index: third_party/WebKit/Source/platform/audio/Panner.cpp
diff --git a/third_party/WebKit/Source/platform/audio/Panner.cpp b/third_party/WebKit/Source/platform/audio/Panner.cpp
index 42060051475bca09b856c54b5fd831f3e525ff6b..5bb0421f0e1fc5da117cdd9a4d12709cd77c892d 100644
--- a/third_party/WebKit/Source/platform/audio/Panner.cpp
+++ b/third_party/WebKit/Source/platform/audio/Panner.cpp
@@ -45,7 +45,7 @@ std::unique_ptr<Panner> Panner::create(PanningModel model,
       return WTF::makeUnique<HRTFPanner>(sampleRate, databaseLoader);
 
     default:
-      ASSERT_NOT_REACHED();
+      NOTREACHED();
       return nullptr;
   }
 }