Only define CPDF_SampledFunc::GetSampleStream() in Skia builds.

Change-Id: I8a4e2bdd097f2c85f9855b8cf2821d712aadbf11
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/51953
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
diff --git a/core/fpdfapi/page/cpdf_sampledfunc.cpp b/core/fpdfapi/page/cpdf_sampledfunc.cpp
index 98fe9e4..45d21ae 100644
--- a/core/fpdfapi/page/cpdf_sampledfunc.cpp
+++ b/core/fpdfapi/page/cpdf_sampledfunc.cpp
@@ -174,6 +174,8 @@
   return true;
 }
 
+#if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_
 RetainPtr<CPDF_StreamAcc> CPDF_SampledFunc::GetSampleStream() const {
   return m_pSampleStream;
 }
+#endif
diff --git a/core/fpdfapi/page/cpdf_sampledfunc.h b/core/fpdfapi/page/cpdf_sampledfunc.h
index 8146bc0..520b692 100644
--- a/core/fpdfapi/page/cpdf_sampledfunc.h
+++ b/core/fpdfapi/page/cpdf_sampledfunc.h
@@ -40,7 +40,10 @@
     return m_EncodeInfo;
   }
   uint32_t GetBitsPerSample() const { return m_nBitsPerSample; }
+
+#if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_
   RetainPtr<CPDF_StreamAcc> GetSampleStream() const;
+#endif
 
  private:
   std::vector<SampleEncodeInfo> m_EncodeInfo;