SkPDF: clean up overuse of SK_SUPPORT_PDF

tests/PDFOpaqueSrcModeToSrcOverTest.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkCanvas.h"
 #include "SkDocument.h"
 #include "SkStream.h"
 #include "Test.h"
 
-#if SK_SUPPORT_PDF
-
 static void run_test(SkWStream* out, SkXfermode::Mode mode, U8CPU alpha) {
     SkAutoTUnref<SkDocument> pdfDoc(SkDocument::CreatePDF(out));
     SkCanvas* c = pdfDoc->beginPage(612.0f, 792.0f);
     SkPaint black;
     SkPaint background;
     background.setColor(SK_ColorWHITE);
     background.setAlpha(alpha);
     background.setXfermodeMode(mode);
     c->drawRect(SkRect::MakeWH(612.0f, 792.0f), background);
     c->drawRect(SkRect::MakeXYWH(36.0f, 36.0f, 9.0f, 9.0f), black);
     c->drawRect(SkRect::MakeXYWH(72.0f, 72.0f, 468.0f, 648.0f), background);
     c->drawRect(SkRect::MakeXYWH(108.0f, 108.0f, 9.0f, 9.0f), black);
     pdfDoc->close();
 }
 
 // http://crbug.com/473572
 DEF_TEST(SkPDF_OpaqueSrcModeToSrcOver, r) {
+    REQUIRE_PDF_DOCUMENT(SkPDF_OpaqueSrcModeToSrcOver, r);
     SkDynamicMemoryWStream srcMode;
     SkDynamicMemoryWStream srcOverMode;
 
     U8CPU alpha = SK_AlphaOPAQUE;
     run_test(&srcMode, SkXfermode::kSrc_Mode, alpha);
     run_test(&srcOverMode, SkXfermode::kSrcOver_Mode, alpha);
     REPORTER_ASSERT(r, srcMode.getOffset() == srcOverMode.getOffset());
     // The two PDFs should be equal because they have an opaque alpha.
 
     srcMode.reset();
     srcOverMode.reset();
 
     alpha = 0x80;
     run_test(&srcMode, SkXfermode::kSrc_Mode, alpha);
     run_test(&srcOverMode, SkXfermode::kSrcOver_Mode, alpha);
     REPORTER_ASSERT(r, srcMode.getOffset() > srcOverMode.getOffset());
     // The two PDFs should not be equal because they have a non-opaque alpha.
 }
-#endif  // SK_SUPPORT_PDF