Start using RenderTargetProxy (omnibus)

src/core/SkImageCacherator.h

Index: src/core/SkImageCacherator.h
diff --git a/src/core/SkImageCacherator.h b/src/core/SkImageCacherator.h
index 8bf335bf512ad20b754f3b0ba5b0f137c5aa5f1a..64f82cc85defd16d943686a4bdbf8b9486c61227 100644
--- a/src/core/SkImageCacherator.h
+++ b/src/core/SkImageCacherator.h
@@ -92,7 +92,7 @@ private:
     struct Validator {
         Validator(sk_sp<SharedGenerator>, const SkIRect* subset);
 
-        operator bool() const { return fSharedGenerator.get(); }
+        operator bool() const { return SkToBool(fSharedGenerator.get()); }
 
         sk_sp<SharedGenerator> fSharedGenerator;
         SkImageInfo            fInfo;