Fix incorrectly disabled SSE2 WebAudio optimizations for Windows.

Source/platform/audio/VectorMath.cpp

Index: Source/platform/audio/VectorMath.cpp
diff --git a/Source/platform/audio/VectorMath.cpp b/Source/platform/audio/VectorMath.cpp
index 0bbe6bae9fdd85f346971db6589ac41a6c2d93f9..cb48cc0634d9322cf15d4ea7617522d3997e8069 100644
--- a/Source/platform/audio/VectorMath.cpp
+++ b/Source/platform/audio/VectorMath.cpp
@@ -35,7 +35,7 @@
 #include <Accelerate/Accelerate.h>
 #endif
 
-#ifdef __SSE2__
+#if CPU(X86) || CPU(X86_64)
 #include <emmintrin.h>
 #endif
 
@@ -135,7 +135,7 @@ void vsma(const float* sourceP, int sourceStride, const float* scale, float* des
 {
     int n = framesToProcess;
 
-#ifdef __SSE2__
+#if CPU(X86) || CPU(X86_64)
     if ((sourceStride == 1) && (destStride == 1)) {
         float k = *scale;
 
@@ -208,7 +208,7 @@ void vsmul(const float* sourceP, int sourceStride, const float* scale, float* de
 {
     int n = framesToProcess;
 
-#ifdef __SSE2__
+#if CPU(X86) || CPU(X86_64)
     if ((sourceStride == 1) && (destStride == 1)) {
         float k = *scale;
 
@@ -279,7 +279,7 @@ void vsmul(const float* sourceP, int sourceStride, const float* scale, float* de
         sourceP += sourceStride;
         destP += destStride;
     }
-#ifdef __SSE2__
+#if CPU(X86) || CPU(X86_64)
     }
 #endif
 }
@@ -288,7 +288,7 @@ void vadd(const float* source1P, int sourceStride1, const float* source2P, int s
 {
     int n = framesToProcess;
 
-#ifdef __SSE2__
+#if CPU(X86) || CPU(X86_64)
     if ((sourceStride1 ==1) && (sourceStride2 == 1) && (destStride == 1)) {
         // If the sourceP address is not 16-byte aligned, the first several frames (at most three) should be processed separately.
         while ((reinterpret_cast<size_t>(source1P) & 0x0F) && n) {
@@ -391,7 +391,7 @@ void vadd(const float* source1P, int sourceStride1, const float* source2P, int s
         source2P += sourceStride2;
         destP += destStride;
     }
-#ifdef __SSE2__
+#if CPU(X86) || CPU(X86_64)
     }
 #endif
 }
@@ -401,7 +401,7 @@ void vmul(const float* source1P, int sourceStride1, const float* source2P, int s
 
     int n = framesToProcess;
 
-#ifdef __SSE2__
+#if CPU(X86) || CPU(X86_64)
     if ((sourceStride1 == 1) && (sourceStride2 == 1) && (destStride == 1)) {
         // If the source1P address is not 16-byte aligned, the first several frames (at most three) should be processed separately.
         while ((reinterpret_cast<uintptr_t>(source1P) & 0x0F) && n) {
@@ -474,7 +474,7 @@ void vmul(const float* source1P, int sourceStride1, const float* source2P, int s
 void zvmul(const float* real1P, const float* imag1P, const float* real2P, const float* imag2P, float* realDestP, float* imagDestP, size_t framesToProcess)
 {
     unsigned i = 0;
-#ifdef __SSE2__
+#if CPU(X86) || CPU(X86_64)
     // Only use the SSE optimization in the very common case that all addresses are 16-byte aligned.
     // Otherwise, fall through to the scalar code below.
     if (!(reinterpret_cast<uintptr_t>(real1P) & 0x0F)
@@ -532,7 +532,7 @@ void vsvesq(const float* sourceP, int sourceStride, float* sumP, size_t framesTo
     int n = framesToProcess;
     float sum = 0;
 
-#ifdef __SSE2__
+#if CPU(X86) || CPU(X86_64)
     if (sourceStride == 1) {
         // If the sourceP address is not 16-byte aligned, the first several frames (at most three) should be processed separately.
         while ((reinterpret_cast<uintptr_t>(sourceP) & 0x0F) && n) {
@@ -597,7 +597,7 @@ void vmaxmgv(const float* sourceP, int sourceStride, float* maxP, size_t framesT
     int n = framesToProcess;
     float max = 0;
 
-#ifdef __SSE2__
+#if CPU(X86) || CPU(X86_64)
     if (sourceStride == 1) {
         // If the sourceP address is not 16-byte aligned, the first several frames (at most three) should be processed separately.
         while ((reinterpret_cast<uintptr_t>(sourceP) & 0x0F) && n) {