Use SkImageCacherator in SkImages

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 01b39be383abe25299881113ba9e45b074e2659d..8c9a73ba36c92f1858be61946293df62d8f2c260 100644
--- a/src/image/SkImage_Base.h
+++ b/src/image/SkImage_Base.h
@@ -54,7 +54,7 @@ public:
 
     virtual void onPreroll(GrContext*) const {}
 
-    virtual GrTexture* getTexture() const { return nullptr; }
+    virtual GrTexture* peekTexture() const { return nullptr; }
 
     // return a read-only copy of the pixels. We promise to not modify them,
     // but only inspect them (or encode them).
@@ -73,6 +73,9 @@ public:
 
     virtual bool onIsLazyGenerated() const { return false; }
 
+    // Caller must call unref when they are done.
+    virtual GrTexture* asTextureRef(GrContext*, SkImageUsageType) const { return nullptr; }
+
 private:
     const SkSurfaceProps fProps;