GitLab

Reason for revert:
Looks like this broke the linux 32 bots:

https://build.chromium.org/p/chromium.linux/builders/Linux%20Tests%20%28dbg%29%281%29%2832%29/builds/9539
lots of failures like:
ASSERTION FAILED: !((reinterpret_cast<uintptr_t>(address) + sizeof(HeapObjectHeader)) & allocationMask)
../../third_party/WebKit/Source/platform/heap/Heap.cpp(875) : void blink::FreeList::addToFreeList(Address, size_t)

TBR=dpranke@chromium.org,rch@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/907953002

Cr-Commit-Position: refs/heads/master@{#315342}