SkPDF: allow PDF module to be disabled in DM and SampleApp

tests/AnnotationTest.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkAnnotation.h"
 #include "SkCanvas.h"
 #include "SkData.h"
 #include "SkDocument.h"
 #include "SkStream.h"
 #include "Test.h"
 
+#if SK_SUPPORT_PDF
+
 /** Returns true if data (may contain null characters) contains needle (null
  *  terminated). */
 static bool ContainsString(const char* data, size_t dataSize, const char* needle) {
     size_t nSize = strlen(needle);
     for (size_t i = 0; i < dataSize - nSize; i++) {
         if (strncmp(&data[i], needle, nSize) == 0) {
             return true;
         }
     }
     return false;
@@ skipping 42 matching lines @@
     SkAutoDataUnref data(SkData::NewWithCString("example"));
     SkAnnotateNamedDestination(canvas, p, data.get());
 
     REPORTER_ASSERT(reporter, doc->close());
     SkAutoDataUnref out(outStream.copyToData());
     const char* rawOutput = (const char*)out->data();
 
     REPORTER_ASSERT(reporter,
         ContainsString(rawOutput, out->size(), "/example "));
 }
+#endif  // SK_SUPPORT_PDF