Re-add common.gypi to help fix closure_compilation.

This is a temporary fix until Dirk can change the closure_compilation
uses of gyp_chromium correctly.

Stolen from Dirk Pranke <dpranke@chromium.org> and stripped of 'includes':
https://codereview.chromium.org/2331423005/

TBR=brettw@chromium.org, dpranke@chromium.org
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
BUG=646969

Review-Url: https://codereview.chromium.org/2345503005
Cr-Commit-Position: refs/heads/master@{#418779}


CrOS-Libchrome-Original-Commit: 0109afc37c2d185d9825e4a93809e4acab435a23
1 file changed
tree: 9c292289db9ae38216f1ef6b96513413311d7ce7
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/