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

Source/modules/webaudio/AudioParam.h

Index: Source/modules/webaudio/AudioParam.h
diff --git a/Source/modules/webaudio/AudioParam.h b/Source/modules/webaudio/AudioParam.h
index 7a673e4ba1e528c5298b62b775466ed3343fff1a..b6c30cbaeb86c30df1f1259b01a0bd3ed32edf5f 100644
--- a/Source/modules/webaudio/AudioParam.h
+++ b/Source/modules/webaudio/AudioParam.h
@@ -85,7 +85,7 @@ public:
     void resetSmoothedValue() { m_smoothedValue = m_value; }
     void setSmoothingConstant(double k) { m_smoothingConstant = k; }
 
-    // Parameter automation.    
+    // Parameter automation.
     void setValueAtTime(float value, double time) { m_timeline.setValueAtTime(value, time); }
     void linearRampToValueAtTime(float value, double time) { m_timeline.linearRampToValueAtTime(value, time); }
     void exponentialRampToValueAtTime(float value, double time) { m_timeline.exponentialRampToValueAtTime(value, time); }
@@ -94,7 +94,7 @@ public:
     void cancelScheduledValues(double startTime) { m_timeline.cancelScheduledValues(startTime); }
 
     bool hasSampleAccurateValues() { return m_timeline.hasValues() || numberOfRenderingConnections(); }
-    
+
     // Calculates numberOfValues parameter values starting at the context's current time.
     // Must be called in the context's render thread.
     void calculateSampleAccurateValues(float* values, unsigned numberOfValues);
@@ -133,7 +133,7 @@ private:
     // Smoothing (de-zippering)
     double m_smoothedValue;
     double m_smoothingConstant;
-    
+
     AudioParamTimeline m_timeline;
 };