fix no-gpu build

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2253073003

TBR=robertphilips
NOTREECHECKS=true

Review-Url: https://codereview.chromium.org/2253073003
diff --git a/src/image/SkImage_Base.h b/src/image/SkImage_Base.h
index 09971c1..a1da0fa 100644
--- a/src/image/SkImage_Base.h
+++ b/src/image/SkImage_Base.h
@@ -8,11 +8,14 @@
 #ifndef SkImage_Base_DEFINED
 #define SkImage_Base_DEFINED
 
-#include "GrTexture.h"
 #include "SkAtomics.h"
 #include "SkImage.h"
 #include "SkSurface.h"
 
+#if SK_SUPPORT_GPU
+    #include "GrTexture.h"
+#endif
+
 #include <new>
 
 class GrTextureParams;
@@ -41,7 +44,9 @@
                               int srcX, int srcY, CachingHint) const;
 
     virtual GrTexture* peekTexture() const { return nullptr; }
+#if SK_SUPPORT_GPU
     virtual sk_sp<GrTexture> refPinnedTexture(uint32_t* uniqueID) const { return nullptr; }
+#endif
     virtual SkImageCacherator* peekCacherator() const { return nullptr; }
 
     // return a read-only copy of the pixels. We promise to not modify them,