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

experimental/PdfViewer/pdfparser/native/SkPdfNativeObject.cpp

Index: experimental/PdfViewer/pdfparser/native/SkPdfNativeObject.cpp
diff --git a/experimental/PdfViewer/pdfparser/native/SkPdfNativeObject.cpp b/experimental/PdfViewer/pdfparser/native/SkPdfNativeObject.cpp
index d9b3c01201e314efe6a64b0981df11d2a5e6a2a7..3f12267cc5992ce2a83f77f326ffe8bd68bc037f 100644
--- a/experimental/PdfViewer/pdfparser/native/SkPdfNativeObject.cpp
+++ b/experimental/PdfViewer/pdfparser/native/SkPdfNativeObject.cpp
@@ -22,12 +22,6 @@
 SkPdfNativeObject SkPdfNativeObject::kNull = SkPdfNativeObject::makeNull();
 
 bool SkPdfNativeObject::applyFlateDecodeFilter() {
-    if (!SkFlate::HaveFlate()) {
-        SkPdfReport(kIgnoreError_SkPdfIssueSeverity, kNoFlateLibrary_SkPdfIssue,
-                    "forgot to link with flate library?", NULL, NULL);
-        return false;
-    }
-
     const unsigned char* old = fStr.fBuffer;
     bool deleteOld = isStreamOwned();