This is a reland of 3f90d9f9
Original change's description:
> [Memory] Add an OnCriticalMemoryPressure method to V8::Platform.
> 
> Adds virtual V8::Platform::OnCriticalMemoryPressure method, default
> implementation does nothing.
> 
> Calls this method on first allocation failures in NewArray, Malloced,
> and zone AccountingAllocator and adds retry logic.
> 
> Adds utility functions for allocating base::VirtualMemory to functions
> in allocation.h, which call this method and add retry logic.
> 
> Calls these utility functions in heap CodeRange, Spaces, StoreBuffer
> and SequentialMarkingDeque.
> 
> Bug: v8:6635
> Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
> Change-Id: I38afd394f3be556aca037d16675e9884658158cb
> Reviewed-on: https://chromium-review.googlesource.com/583543
> Commit-Queue: Bill Budge <bbudge@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46988}

Bug: v8:6635
Change-Id: I0d70c5796f407f0ed42cfddf581d26f533f9bea8
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/593090Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47027}