Fix virtual/override/final usage in Source/platform/.

Source/platform/audio/MultiChannelResampler.cpp

Index: Source/platform/audio/MultiChannelResampler.cpp
diff --git a/Source/platform/audio/MultiChannelResampler.cpp b/Source/platform/audio/MultiChannelResampler.cpp
index 683674ec679c8dc0a727ec93a240e48ac7eb5bf0..b87ac12f0e136584f53afcd789570ce911be98d1 100644
--- a/Source/platform/audio/MultiChannelResampler.cpp
+++ b/Source/platform/audio/MultiChannelResampler.cpp
@@ -53,7 +53,7 @@ public:
 
     // provideInput() will be called once for each channel, starting with the first channel.
     // Each time it's called, it will provide the next channel of data.
-    virtual void provideInput(AudioBus* bus, size_t framesToProcess) override
+    void provideInput(AudioBus* bus, size_t framesToProcess) override
     {
         bool isBusGood = bus && bus->numberOfChannels() == 1;
         ASSERT(isBusGood);