am 6726d6bb: Merge "Support pre-loading browser plugins on the system image." into gingerbread

Merge commit '6726d6bb1a30167786864c445cbe0370ee0dd58c' into gingerbread-plus-aosp

* commit '6726d6bb1a30167786864c445cbe0370ee0dd58c':
  Support pre-loading browser plugins on the system image.