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

Source/core/platform/audio/Biquad.cpp

Index: Source/core/platform/audio/Biquad.cpp
diff --git a/Source/core/platform/audio/Biquad.cpp b/Source/core/platform/audio/Biquad.cpp
index 5928357af263b108eeabc9e9a5f9f8498d09fe42..a9f97601593264e03155d8dac22a6a8f5adf86fd 100644
--- a/Source/core/platform/audio/Biquad.cpp
+++ b/Source/core/platform/audio/Biquad.cpp
@@ -208,7 +208,7 @@ void Biquad::setLowpassParams(double cutoff, double resonance)
 {
     // Limit cutoff to 0 to 1.
     cutoff = std::max(0.0, std::min(cutoff, 1.0));
-    
+
     if (cutoff == 1) {
         // When cutoff is 1, the z-transform is 1.
         setNormalizedCoefficients(1, 0, 0,
@@ -281,7 +281,7 @@ void Biquad::setHighpassParams(double cutoff, double resonance)
 void Biquad::setNormalizedCoefficients(double b0, double b1, double b2, double a0, double a1, double a2)
 {
     double a0Inverse = 1 / a0;
-    
+
     m_b0 = b0 * a0Inverse;
     m_b1 = b1 * a0Inverse;
     m_b2 = b2 * a0Inverse;
@@ -306,7 +306,7 @@ void Biquad::setLowShelfParams(double frequency, double dbGain)
 {
     // Clip frequencies to between 0 and 1, inclusive.
     frequency = std::max(0.0, std::min(frequency, 1.0));
-    
+
     double A = pow(10.0, dbGain / 40);
 
     if (frequency == 1) {
@@ -495,7 +495,7 @@ void Biquad::setBandpassParams(double frequency, double Q)
         if (Q > 0) {
             double alpha = sin(w0) / (2 * Q);
             double k = cos(w0);
-    
+
             double b0 = alpha;
             double b1 = 0;
             double b2 = -alpha;
@@ -570,7 +570,7 @@ void Biquad::getFrequencyResponse(int nFrequencies,
     double b2 = m_b2;
     double a1 = m_a1;
     double a2 = m_a2;
-    
+
     for (int k = 0; k < nFrequencies; ++k) {
         double omega = -piDouble * frequency[k];
         Complex z = Complex(cos(omega), sin(omega));