Rename OS(DARWIN) to OS(MACOSX).

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 a9f97601593264e03155d8dac22a6a8f5adf86fd..20c6487a63cfe167774549d4b466792c95532a8b 100644
--- a/Source/core/platform/audio/Biquad.cpp
+++ b/Source/core/platform/audio/Biquad.cpp
@@ -37,7 +37,7 @@
 #include "core/platform/audio/DenormalDisabler.h"
 #include "wtf/MathExtras.h"
 
-#if OS(DARWIN)
+#if OS(MACOSX)
 #include <Accelerate/Accelerate.h>
 #endif
 
@@ -47,7 +47,7 @@ const int kBufferSize = 1024;
 
 Biquad::Biquad()
 {
-#if OS(DARWIN)
+#if OS(MACOSX)
     // Allocate two samples more for filter history
     m_inputBuffer.allocate(kBufferSize + 2);
     m_outputBuffer.allocate(kBufferSize + 2);
@@ -74,7 +74,7 @@ Biquad::~Biquad()
 
 void Biquad::process(const float* sourceP, float* destP, size_t framesToProcess)
 {
-#if OS(DARWIN)
+#if OS(MACOSX)
     // Use vecLib if available
     processFast(sourceP, destP, framesToProcess);
 
@@ -125,7 +125,7 @@ void Biquad::process(const float* sourceP, float* destP, size_t framesToProcess)
 #endif
 }
 
-#if OS(DARWIN)
+#if OS(MACOSX)
 
 // Here we have optimized version using Accelerate.framework
 
@@ -179,12 +179,12 @@ void Biquad::processSliceFast(double* sourceP, double* destP, double* coefficien
     destP[1] = destP[framesToProcess - 1 + 2];
 }
 
-#endif // OS(DARWIN)
+#endif // OS(MACOSX)
 
 
 void Biquad::reset()
 {
-#if OS(DARWIN)
+#if OS(MACOSX)
     // Two extra samples for filter history
     double* inputP = m_inputBuffer.data();
     inputP[0] = 0;