Update brightray to Chrome 31

* vendor/brightray bbf7fcb...fa27de6 (6):
  > Merge pull request #38 from brightray/chrome-31
  > Merge pull request #37 from brightray/virtual-initialize
  > Merge pull request #36 from brightray/linux
  > Merge pull request #35 from brightray/fix-black-devtools
  > Merge pull request #34 from brightray/cpplint
  > Merge pull request #33 from brightray/linux
Update for changes to V8's API in Chrome 31
Update for ui -> gfx moves in Chrome 31

See https://codereview.chromium.org/23769011.
Merge pull request #17 from brightray/chrome-31

Update to Chrome 31