Revert of [Extensions] Make extension message bubble factory platform-abstract

Revert of [Extensions] Make extension message bubble factory platform-abstract (patchset #4 id:120001 of https://codereview.chromium.org/1078543002/)

Reason for revert:
Looks like this caused crbug.com/476426. Reverting to investigate.

Original issue's description:
> [Extensions] Make extension message bubble factory platform-abstract
>
> We want to show extension message bubbles on multiple platforms;
> the first step towards this is to make the bubble factory
> platform-abstract. Do so, and as an added bonus, shave off
> 200 lines of code.
>
> BUG=474092
>
> Committed: https://crrev.com/a9a17da0de2260f6cb1a10b542a6d3a2b5fbf504
> Cr-Commit-Position: refs/heads/master@{#324715}

TBR=finnur@chromium.org,sky@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=474092
Committed: https://crrev.com/86261efe450def1b2c9b55514d40fb5c14290817
Cr-Commit-Position: refs/heads/master@{#324876}

[Devlin, 2015-04-13 17:40:44]

Created Revert of [Extensions] Make extension message bubble factory
platform-abstract

[commit-bot: I haz the power, 2015-04-13 17:40:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1081113002/1

[commit-bot: I haz the power, 2015-04-13 17:42:40]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-13 17:43:28]

Patchset 1 (id:??) landed as
https://crrev.com/86261efe450def1b2c9b55514d40fb5c14290817
Cr-Commit-Position: refs/heads/master@{#324876}

[Nico, 2015-04-13 20:46:56]

thakis@chromium.org changed reviewers:
+ thakis@chromium.org

[Nico, 2015-04-13 20:46:57]

Thanks for the revert! This helped:
http://build.chromium.org/p/chromium.fyi/builders/CrWinClang%20tester/builds/321

I haven't yet tried to build browser_tests with msvs in official mode. Let me
know if you can't repro this in an official build with msvs, then I'll check if
this is compiler-specific for some reason.