Share PPAPI out-of-process plugins between renderer processes....

Share PPAPI out-of-process plugins between renderer processes.

This provides the hook-up for plugin sharing but not shutdown or cleanup from
errors. There is still a lot of work to do cleaning up in the plugin and the
browser when a renderer dies, or cleaning up in the renderer and browser when a
plugin dies. Currently, even the normal exit case crashes in the browser. But
fixing it in this patch would be too complicated to write or review, so I'm
going to do shutdown & error handling in a followup.


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=74766

[brettw, 2011-02-11 17:24:11]

Note that a bunch of dates on generated GPU files changed because I had to
regenerate everything.

[brettw, 2011-02-13 17:50:36]

I'm TBRing this since I'm blocked on working on the proxy until this is in.
Please don't skip reviewing it.