am 2705c8f0: Merge "DO NOT MERGE. force plugins to render on top of browser content." into eclair-mr2

Merge commit '2705c8f09975f1bf10c84af323a67c104a177129' into eclair-mr2-plus-aosp

* commit '2705c8f09975f1bf10c84af323a67c104a177129':
  DO NOT MERGE. force plugins to render on top of browser content.