pin as texture api

src/image/SkImage_Base.h

Index: src/image/SkImage_Base.h
diff --git a/src/image/SkImage_Base.h b/src/image/SkImage_Base.h
index 1cfb7daad67e126b792e4bd500dc497a9314dc85..09971c1198de0333122fa3a9289ce7ba76009549 100644
--- a/src/image/SkImage_Base.h
+++ b/src/image/SkImage_Base.h
@@ -8,6 +8,7 @@
 #ifndef SkImage_Base_DEFINED
 #define SkImage_Base_DEFINED
 
+#include "GrTexture.h"
 #include "SkAtomics.h"
 #include "SkImage.h"
 #include "SkSurface.h"
@@ -40,6 +41,7 @@ public:
                               int srcX, int srcY, CachingHint) const;
 
     virtual GrTexture* peekTexture() const { return nullptr; }
+    virtual sk_sp<GrTexture> refPinnedTexture(uint32_t* uniqueID) const { return nullptr; }
     virtual SkImageCacherator* peekCacherator() const { return nullptr; }
 
     // return a read-only copy of the pixels. We promise to not modify them,
@@ -69,6 +71,9 @@ public:
         fAddedToCache.store(true);
     }
 
+    virtual void onPinAsTexture(GrContext*) const {}
+    virtual void onUnpinAsTexture(GrContext*) const {}
+
 private:
     // Set true by caches when they cache content that's derived from the current pixels.
     mutable SkAtomic<bool> fAddedToCache;