491     : fHead(other.fHead)  in SkDynamicMemoryWStream()
495     other.fHead = nullptr;  in SkDynamicMemoryWStream()
513     Block* block = fHead;  in reset()
519     fHead = fTail = nullptr;  in reset()
561             fHead = fTail = block;  in write()
579     dst->fTail->fNext = fHead;  in writeToAndReset()
582     fHead = fTail = nullptr;  in writeToAndReset()
597     fTail->fNext = dst->fHead;  in prependToAndReset()
598     dst->fHead = fHead;  in prependToAndReset()
600     fHead = fTail = nullptr;  in prependToAndReset()
610     Block* block = fHead;  in read()
630     Block* block = fHead;  in copyTo()
641     for (Block* block = fHead; block != nullptr; block = block->fNext) {  in writeToStream()
673     Block* block = fHead;  in copyToAndReset()
682     fHead = fTail = nullptr;  in copyToAndReset()
691     for (Block* block = fHead; block != nullptr; ) {  in writeToAndReset()
699     fHead = fTail = nullptr;  in writeToAndReset()
716     if (!fHead) {  in validate()
724     const Block* block = fHead;  in validate()
739     explicit SkBlockMemoryRefCnt(SkDynamicMemoryWStream::Block* head) : fHead(head) { }  in SkBlockMemoryRefCnt()
742         SkDynamicMemoryWStream::Block* block = fHead;  in ~SkBlockMemoryRefCnt()
750     SkDynamicMemoryWStream::Block* const fHead;  member in SkBlockMemoryRefCnt
756         : fBlockMemory(std::move(headRef)), fCurrent(fBlockMemory->fHead)  in SkBlockMemoryStream()
811         fCurrent = fBlockMemory->fHead;  in rewind()
859         if (fBlockMemory->fHead && !fBlockMemory->fHead->fNext) {  in getMemoryBase()
860             return fBlockMemory->fHead->start();  in getMemoryBase()
874     if (nullptr == fHead) {  in detachAsStream()
878     if (fHead == fTail) {  // one block, may be worth shrinking.  in detachAsStream()
880         fHead = fTail = (SkDynamicMemoryWStream::Block*)sk_realloc_throw(fTail, SkToSizeT(used));  in detachAsStream()
886             = std::make_unique<SkBlockMemoryStream>(sk_make_sp<SkBlockMemoryRefCnt>(fHead),  in detachAsStream()
888     fHead = nullptr;    // signal reset() to not free anything  in detachAsStream()