Revert of Implemented explicit resizing from guestview.

Revert of Implemented explicit resizing from guestview. (patchset #6 id:120001 of https://codereview.chromium.org/847893002/)

Reason for revert:
Broke out of process PDF.

Original issue's description:
> Implemented explicit resizing from guestview.
>
> A guest can now be explicitly resized (in addition to autosizing) from guest_view.js, using the new |setSize| function. This new function combines autosizing and normal resizing, as described in: https://docs.google.com/document/d/1EJfmJSK0JJsxKptSRhepnsOOwvXJNv5nnJ1pZdjGDRQ
>
> BUG=434226
>
> Committed: https://crrev.com/681a4fc1d1ac77a17c69ba23fa6710a0e3aa206f
> Cr-Commit-Position: refs/heads/master@{#311286}

TBR=paulmeyer@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=434226
Committed: https://crrev.com/78a50272ee606506c156aa4b34f4f03c5a4f654a
Cr-Commit-Position: refs/heads/master@{#311379}

[Fady Samuel, 2015-01-14 00:53:24]

Created Revert of Implemented explicit resizing from guestview.

[commit-bot: I haz the power, 2015-01-14 00:55:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/800543005/1

[commit-bot: I haz the power, 2015-01-14 01:00:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-14 01:03:34]

Patchset 1 (id:??) landed as
https://crrev.com/78a50272ee606506c156aa4b34f4f03c5a4f654a
Cr-Commit-Position: refs/heads/master@{#311379}