12     Block*  fNext;  member
22         fNext   = fPrev = nullptr;  in init()
61         Block* next = head->fNext;  in ~SkDeque()
89             first->fNext = fFrontBlock;  in push_front()
130             fBackBlock->fNext = last;  in push_back()
159         first = first->fNext;  in pop_front()
175         if (nullptr == first->fNext) {  in pop_front()
178             SkASSERT(first->fNext->fBegin);  in pop_front()
179             fFront = first->fNext->fBegin;  in pop_front()
194         last->fNext = nullptr;  in pop_back()
221     for (const Block* temp = fFrontBlock; temp; temp = temp->fNext) {  in numBlocksAllocated()
256                 fCurBlock = fCurBlock->fNext;  in next()
296             fCurBlock = fCurBlock->fNext;  in reset()