Use the winheap allocator for TSan/Win

This should allow us to run much more tests when needed.
Some previously-supported tests may show some new true or false reports so we
might need to update the suppressions after this lands.

BUG=99036
TBR=eugenis
Review URL: https://codereview.chromium.org/12212028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@180943 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed