eliminate SK_BUILD_FOR_WIN32

SK_BUILD_FOR_WIN and SK_BUILD_FOR_WIN32 have long meant the same thing.

Chrome fix is https://chromium-review.googlesource.com/c/chromium/src/+/884007

Change-Id: I0e907b1bcd2a358eabf776f414fd3aeb3c689561
Reviewed-on: https://skia-review.googlesource.com/99340
Reviewed-by: Mike Reed <reed@google.com>
diff --git a/samplecode/SampleChineseFling.cpp b/samplecode/SampleChineseFling.cpp
index cf14013..ef86747 100644
--- a/samplecode/SampleChineseFling.cpp
+++ b/samplecode/SampleChineseFling.cpp
@@ -32,7 +32,7 @@
 static sk_sp<SkTypeface> chinese_typeface() {
 #ifdef SK_BUILD_FOR_ANDROID
     return MakeResourceAsTypeface("fonts/NotoSansCJK-Regular.ttc");
-#elif defined(SK_BUILD_FOR_WIN32)
+#elif defined(SK_BUILD_FOR_WIN)
     return SkTypeface::MakeFromName("SimSun", SkFontStyle());
 #elif defined(SK_BUILD_FOR_MAC)
     return SkTypeface::MakeFromName("Hiragino Sans GB W3", SkFontStyle());