Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/modules/webaudio/BiquadDSPKernel.h

Index: Source/modules/webaudio/BiquadDSPKernel.h
diff --git a/Source/modules/webaudio/BiquadDSPKernel.h b/Source/modules/webaudio/BiquadDSPKernel.h
index 7ce741acbeb97a35c4bc89440cc33ee88e88b789..74a8d072733a262c992909f0936a30eb3004c1bf 100644
--- a/Source/modules/webaudio/BiquadDSPKernel.h
+++ b/Source/modules/webaudio/BiquadDSPKernel.h
@@ -36,12 +36,12 @@ class BiquadProcessor;
 // BiquadDSPKernel is an AudioDSPKernel and is responsible for filtering one channel of a BiquadProcessor using a Biquad object.
 
 class BiquadDSPKernel : public AudioDSPKernel {
-public:  
+public:
     explicit BiquadDSPKernel(BiquadProcessor* processor)
     : AudioDSPKernel(processor)
     {
     }
-    
+
     // AudioDSPKernel
     virtual void process(const float* source, float* dest, size_t framesToProcess);
     virtual void reset() { m_biquad.reset(); }