Revert 157650 - This is followup from Charlie's comments on Fady's cl: http://chromiumcodereview.ap…

Revert 157650 - This is followup from Charlie's comments on Fady's cl: http://chromiumcodereview.appspot.com/10560022, it seems I cannot upload patch to that issue (since I'm not owner), I'm creating a new one.

Introduced too many static initializers - broke linux sizes.

Split Embedder and Guest 'roles' for browser plugin, web contents can now play any or both roles, main idea is to have more readable separation between the two.
Also stop creating browser_plugin counterpart in browser/host for every web_contents, instead create them only when there's a browser_plugin element.


BUG=141232
Review URL: https://chromiumcodereview.appspot.com/10868012

TBR=lazyboy@chromium.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=157656

[lazyboy, 2012-09-19 23:55:29]

lgtm