Revert of Refactor GuestViewContainer::AttachRequest to allow for other request types

Revert of Refactor GuestViewContainer::AttachRequest to allow for other request types (patchset #2 id:20001 of https://codereview.chromium.org/765843003/)

Reason for revert:
Bots appear to be complaining of static initializers. http://build.chromium.org/p/chromium/buildstatus?builder=Linux&number=55741

Original issue's description:
> Refactor GuestViewContainer::AttachRequest to allow for other request types
>
> In a subsequent CL, DetachGuest will be introduced, to allow a GuestView to
> detach itself from its container. This CL performs the necessary refactor to allow
> for new operations to be easily introduced.
>
> This CL also makes BrowserPlugin IDs unique per process. This allows addressing attachment, and soon detachment, across JavaScript contexts.
>
> BUG=434226
> TBR=lazyboy@chromium.org
>
> Committed: https://crrev.com/d397750f3e2e53f414a4798c4e5039837a8c00ea
> Cr-Commit-Position: refs/heads/master@{#306025}

TBR=paulmeyer@chromium.org,fsamuel@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=434226
Committed: https://crrev.com/73232ae23928136c158b86ae5108f173f46c06d0
Cr-Commit-Position: refs/heads/master@{#306044}

[danakj, 2014-11-28 03:31:45]

Created Revert of Refactor GuestViewContainer::AttachRequest to allow for other
request types

[commit-bot: I haz the power, 2014-11-28 03:32:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/764863003/1

[commit-bot: I haz the power, 2014-11-28 03:32:20]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-28 03:33:04]

Patchset 1 (id:??) landed as
https://crrev.com/73232ae23928136c158b86ae5108f173f46c06d0
Cr-Commit-Position: refs/heads/master@{#306044}