Revert "Remove web/{android, gtk, win}"

This reverts commit 8e811a6c86c81d9267832a6ac83298d9a814ee3b.

Reverting due to compile failure on Linux Aura:
http://build.chromium.org/p/chromium.webkit/builders/Linux%20Aura/builds/11755/steps/compile/logs/stdio

BUG=none

Review URL: https://codereview.chromium.org/27532002

git-svn-id: svn://svn.chromium.org/blink/trunk@159779 bbb929c8-8fbe-4397-9dbb-9b2b20218538