Mark some CFX_DIBitmap methods as Skia-only.

Since their callers are Skia-only.

Change-Id: I24b1299dfb48a49ca65ecc34541d62c5c618f8f8
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/73792
Reviewed-by: Hui Yingst <nigi@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/core/fxge/dib/cfx_dibitmap.cpp b/core/fxge/dib/cfx_dibitmap.cpp
index 6f97805..c6c94bb 100644
--- a/core/fxge/dib/cfx_dibitmap.cpp
+++ b/core/fxge/dib/cfx_dibitmap.cpp
@@ -534,6 +534,7 @@
   return true;
 }
 
+#if defined(_SKIA_SUPPORT_) || defined(_SKIA_SUPPORT_PATHS_)
 uint32_t CFX_DIBitmap::GetPixel(int x, int y) const {
   if (!m_pBuffer)
     return 0;
@@ -568,7 +569,9 @@
   }
   return 0;
 }
+#endif  // defined(_SKIA_SUPPORT_) || defined(_SKIA_SUPPORT_PATHS_)
 
+#if defined(_SKIA_SUPPORT_)
 void CFX_DIBitmap::SetPixel(int x, int y, uint32_t color) {
   if (!m_pBuffer)
     return;
@@ -638,6 +641,7 @@
       break;
   }
 }
+#endif  // defined(_SKIA_SUPPORT_)
 
 void CFX_DIBitmap::DownSampleScanline(int line,
                                       uint8_t* dest_scan,
diff --git a/core/fxge/dib/cfx_dibitmap.h b/core/fxge/dib/cfx_dibitmap.h
index ae9b258..4e78f4a 100644
--- a/core/fxge/dib/cfx_dibitmap.h
+++ b/core/fxge/dib/cfx_dibitmap.h
@@ -49,8 +49,12 @@
   bool ConvertFormat(FXDIB_Format format);
   void Clear(uint32_t color);
 
+#if defined(_SKIA_SUPPORT_) || defined(_SKIA_SUPPORT_PATHS_)
   uint32_t GetPixel(int x, int y) const;
+#endif
+#if defined(_SKIA_SUPPORT_)
   void SetPixel(int x, int y, uint32_t color);
+#endif
 
   bool LoadChannelFromAlpha(FXDIB_Channel destChannel,
                             const RetainPtr<CFX_DIBBase>& pSrcBitmap);