Fix trailing whitespace in .cpp, .h, and .idl files

Source/core/platform/audio/MultiChannelResampler.h

Index: Source/core/platform/audio/MultiChannelResampler.h
diff --git a/Source/core/platform/audio/MultiChannelResampler.h b/Source/core/platform/audio/MultiChannelResampler.h
index a5164a7d18db643dc617a58cbc72c81c6f540c08..16a57fd532cbbf4d0994ecf08ee7807b6be92d40 100644
--- a/Source/core/platform/audio/MultiChannelResampler.h
+++ b/Source/core/platform/audio/MultiChannelResampler.h
@@ -35,11 +35,11 @@
 namespace WebCore {
 
 class AudioBus;
-    
+
 class MultiChannelResampler {
-public:   
+public:
     MultiChannelResampler(double scaleFactor, unsigned numberOfChannels);
-    
+
     // Process given AudioSourceProvider for streaming applications.
     void process(AudioSourceProvider*, AudioBus* destination, size_t framesToProcess);
 
@@ -47,10 +47,10 @@ private:
     // FIXME: the mac port can have a more highly optimized implementation based on CoreAudio
     // instead of SincResampler. For now the default implementation will be used on all ports.
     // https://bugs.webkit.org/show_bug.cgi?id=75118
-    
+
     // Each channel will be resampled using a high-quality SincResampler.
     Vector<OwnPtr<SincResampler> > m_kernels;
-    
+
     unsigned m_numberOfChannels;
 };