Add haraken@ to wtf/OWNERS
Add haraken@ to wtf/OWNERS

haraken@ has reviewed a bunch of changes to PartitoinAlloc,
WTF collections related to Oilpan and ArrayBuffers.
haraken@ also has landed 60+ patches to wtf/.

BUG=
NOTRY=true

Review URL: https://codereview.chromium.org/1269573002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@199807 bbb929c8-8fbe-4397-9dbb-9b2b20218538

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk