tree a3dce54b853971385059e74a5c4b835b4ba05867
parent 10db24067e4fef84533401b1e2337bdbb5648e4c
author sigbjornf@opera.com <sigbjornf@opera.com> 1424738030 +0000
committer sigbjornf@opera.com <sigbjornf@opera.com> 1424738030 +0000

Allow Oilpan heap objects account for their external allocations.

The GC heuristics take into account the amount of objects allocated since
the last GC, in terms of the amount of Oilpan heap bytes allocated.

It does not consider the amount of external memory owned by an
Oilpan object. Allow objects to register such external allocations and
have the GC heuristics consider it -- if the heap isn't otherwise
considered worth GCing but it contains references to a large amount of
external memory, scheduling a GC may lessen the overall memory pressure
for the process.

Along with this, also add support for letting the outside world notify
Oilpan that a GC is now really worth considering. Intended used by other
allocators if they are running into near-OOM conditions.

R=haraken
BUG=456498

Review URL: https://codereview.chromium.org/875503003

git-svn-id: svn://svn.chromium.org/blink/trunk@190702 bbb929c8-8fbe-4397-9dbb-9b2b20218538