480     : fHead(other.fHead)  in SkDynamicMemoryWStream()
484     other.fHead = nullptr;  in SkDynamicMemoryWStream()
502     Block* block = fHead;  in reset()
508     fHead = fTail = nullptr;  in reset()
550             fHead = fTail = block;  in write()
568     dst->fTail->fNext = fHead;  in writeToAndReset()
571     fHead = fTail = nullptr;  in writeToAndReset()
586     fTail->fNext = dst->fHead;  in prependToAndReset()
587     dst->fHead = fHead;  in prependToAndReset()
589     fHead = fTail = nullptr;  in prependToAndReset()
599     Block* block = fHead;  in read()
619     Block* block = fHead;  in copyTo()
630     for (Block* block = fHead; block != nullptr; block = block->fNext) {  in writeToStream()
662     Block* block = fHead;  in copyToAndReset()
671     fHead = fTail = nullptr;  in copyToAndReset()
680     for (Block* block = fHead; block != nullptr; ) {  in writeToAndReset()
688     fHead = fTail = nullptr;  in writeToAndReset()
705     if (!fHead) {  in validate()
713     const Block* block = fHead;  in validate()
728     explicit SkBlockMemoryRefCnt(SkDynamicMemoryWStream::Block* head) : fHead(head) { }  in SkBlockMemoryRefCnt()
731         SkDynamicMemoryWStream::Block* block = fHead;  in ~SkBlockMemoryRefCnt()
739     SkDynamicMemoryWStream::Block* const fHead;  member in SkBlockMemoryRefCnt
745         : fBlockMemory(std::move(headRef)), fCurrent(fBlockMemory->fHead)  in SkBlockMemoryStream()
800         fCurrent = fBlockMemory->fHead;  in rewind()
848         if (fBlockMemory->fHead && !fBlockMemory->fHead->fNext) {  in getMemoryBase()
849             return fBlockMemory->fHead->start();  in getMemoryBase()
863     if (nullptr == fHead) {  in detachAsStream()
867     if (fHead == fTail) {  // one block, may be worth shrinking.  in detachAsStream()
869         fHead = fTail = (SkDynamicMemoryWStream::Block*)sk_realloc_throw(fTail, SkToSizeT(used));  in detachAsStream()
875             = skstd::make_unique<SkBlockMemoryStream>(sk_make_sp<SkBlockMemoryRefCnt>(fHead),  in detachAsStream()
877     fHead = nullptr;    // signal reset() to not free anything  in detachAsStream()