Make 'License' field in third-party metadata required

This will simplify the addition of a tool to check licenses for the purpose of
the Android WebView build.

See also http://codereview.chromium.org/10827099

Also adds other missing fields to these README.chromium files as required by
presubmit checks and fixes a regex used to enforce this.

BUG=138921

Review URL: https://chromiumcodereview.appspot.com/10821103

Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 31eac5b5a5025e025b12d3719461f785848c55bb
1 file changed
tree: beb4e6b834553e4585b3bcca97a7c541fba4623b
  1. CFBase.h
  2. CFRuntime.h
  3. LICENSE
  4. README.chromium
  5. cssmapplePriv.h
  6. malloc.h