269     class UniqueID {
271         static UniqueID InvalidID() {  in InvalidID()
272             return UniqueID(uint32_t(SK_InvalidUniqueID));  in InvalidID()
276         explicit UniqueID(const GrGpuResource::UniqueID& id) : fID(id.asUInt()) { }  in UniqueID()  function
278         UniqueID() : fID(GrGpuResource::CreateUniqueID()) { }  in UniqueID()  function
282         bool operator==(const UniqueID& other) const {
285         bool operator!=(const UniqueID& other) const {
293         explicit UniqueID(uint32_t id) : fID(id) {}  in UniqueID()  function
313     UniqueID uniqueID() const { return fUniqueID; }  in uniqueID()
315     UniqueID underlyingUniqueID() const {  in underlyingUniqueID()
317             return UniqueID(fTarget->uniqueID());  in underlyingUniqueID()
490     const UniqueID         fUniqueID; // set from the backing resource for wrapped resources