Rename OS(DARWIN) to OS(MACOSX).

Source/core/platform/image-decoders/ImageDecoder.h

Index: Source/core/platform/image-decoders/ImageDecoder.h
diff --git a/Source/core/platform/image-decoders/ImageDecoder.h b/Source/core/platform/image-decoders/ImageDecoder.h
index 9aa4b9b00cf10c9ed5bdb68aebcef46ac80b7726..2beba3ec2cbc2feecfee8eb0131fb7c2b4f655e4 100644
--- a/Source/core/platform/image-decoders/ImageDecoder.h
+++ b/Source/core/platform/image-decoders/ImageDecoder.h
@@ -40,7 +40,7 @@
 
 #if USE(QCMSLIB)
 #include "qcms.h"
-#if OS(DARWIN)
+#if OS(MACOSX)
 #include <ApplicationServices/ApplicationServices.h>
 #include "core/platform/graphics/cg/GraphicsContextCG.h"
 #include "wtf/RetainPtr.h"
@@ -357,7 +357,7 @@ namespace WebCore {
             if (!qcmsInitialized) {
                 qcmsInitialized = true;
                 // FIXME: Add optional ICCv4 support.
-#if OS(DARWIN)
+#if OS(MACOSX)
                 RetainPtr<CGColorSpaceRef> monitorColorSpace(AdoptCF, CGDisplayCopyColorSpace(CGMainDisplayID()));
                 CFDataRef iccProfile(CGColorSpaceCopyICCProfile(monitorColorSpace.get()));
                 if (iccProfile) {