Revert of Ensure that the browser’s copy of page id is in sync with the renderer’s.

Revert of Ensure that the browser’s copy of page id is in sync with the renderer’s. (patchset #3 id:40001 of https://codereview.chromium.org/609943002/)

Reason for revert:
Crash data coming in, in version 40.0.2174.0.
See http://crbug.com/419129 for details.

Original issue's description:
> Ensure that the browser’s copy of page id is in sync with the renderer’s.
>
> This is likely to crash, and so has debugging statements.
>
> BUG=407376
> TEST=no crashing, we hope
>
> Committed: https://crrev.com/af3e9e0b1325f0f4aaaf784c1379ffa34a20c31e
> Cr-Commit-Position: refs/heads/master@{#297263}

TBR=rsesek@chromium.org,avi@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=407376
Committed: https://crrev.com/c619607dd99bfdeda399ef91e748e10629a60032
Cr-Commit-Position: refs/heads/master@{#297512}

[Charlie Reis, 2014-09-30 21:45:58]

Created Revert of Ensure that the browser’s copy of page id is in sync with the
renderer’s.

[commit-bot: I haz the power, 2014-09-30 21:47:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/616163002/1

[commit-bot: I haz the power, 2014-09-30 21:49:04]

Committed patchset #1 (id:1) as 971c52b3afb80a14f0c82a732a6e54a7021197b8

[commit-bot: I haz the power, 2014-09-30 21:50:56]

Patchset 1 (id:??) landed as
https://crrev.com/c619607dd99bfdeda399ef91e748e10629a60032
Cr-Commit-Position: refs/heads/master@{#297512}