zlib/pdf: remove HaveFlate(), depend on preprocessor defines

src/pdf/SkPDFImage.cpp

Index: src/pdf/SkPDFImage.cpp
diff --git a/src/pdf/SkPDFImage.cpp b/src/pdf/SkPDFImage.cpp
index 3c0d850fda9d1d0273e280d13452c3a239aa521a..0b6c81f77a382a6cded9bdc61db3b27f8f623e76 100644
--- a/src/pdf/SkPDFImage.cpp
+++ b/src/pdf/SkPDFImage.cpp
@@ -630,9 +630,14 @@ bool SkPDFImage::populate(SkPDFCatalog* catalog) {
             fStreamValid = true;
         }
         return INHERITED::populate(catalog);
-    } else if (getState() == kNoCompression_State &&
-            !skip_compression(catalog) &&
-            (SkFlate::HaveFlate() || fEncoder)) {
+    }
+#ifndef SK_NO_FLATE
+    else if (getState() == kNoCompression_State && !skip_compression(catalog)) {
+#else  // SK_NO_FLATE
+    else if (getState() == kNoCompression_State &&
+             !skip_compression(catalog) &&
+             fEncoder) {
+#endif  // SK_NO_FLATE
         // Compression has not been requested when the stream was first created,
         // but the new catalog wants it compressed.
         if (!getSubstitute()) {