Revert of Fix HistoryEntry corruption when commit isn't for provisional entry.

Revert of Fix HistoryEntry corruption when commit isn't for provisional entry. (patchset #2 id:20001 of https://codereview.chromium.org/1848103004/ )

Reason for revert:
This led to crashes in HistoryController::UpdateForCommit if there is no current entry and the provisional entry doesn't match the commit.  See https://crbug.com/600238.  I'll land an updated fix.

Original issue's description:
> Fix HistoryEntry corruption when commit isn't for provisional entry.
>
> BUG=597322
> TEST=See bug for repro steps.
>
> Committed: https://crrev.com/bb3548ef2fcdb58f9bc638bb5a3c379320fdd0e0
> Cr-Commit-Position: refs/heads/master@{#384659}

TBR=japhet@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=597322
Committed: https://crrev.com/413fc09a3fa2e915410d39034d78661837468633
Cr-Commit-Position: refs/heads/master@{#384938}

[Charlie Reis, 2016-04-04 16:29:30]

Created Revert of Fix HistoryEntry corruption when commit isn't for provisional
entry.

[commit-bot: I haz the power, 2016-04-04 16:29:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1859593003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1859593003/1

[commit-bot: I haz the power, 2016-04-04 16:31:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1859593003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1859593003/1

[commit-bot: I haz the power, 2016-04-04 17:01:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1859593003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1859593003/1

[commit-bot: I haz the power, 2016-04-04 17:32:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1859593003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1859593003/1

[commit-bot: I haz the power, 2016-04-04 17:43:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-04 17:45:17]

Description was changed from

==========
Revert of Fix HistoryEntry corruption when commit isn't for provisional entry.
(patchset #2 id:20001 of https://codereview.chromium.org/1848103004/ )

Reason for revert:
This led to crashes in HistoryController::UpdateForCommit if there is no current
entry and the provisional entry doesn't match the commit.  See
https://crbug.com/600238.  I'll land an updated fix.

Original issue's description:
> Fix HistoryEntry corruption when commit isn't for provisional entry.
> 
> BUG=597322
> TEST=See bug for repro steps.
> 
> Committed: https://crrev.com/bb3548ef2fcdb58f9bc638bb5a3c379320fdd0e0
> Cr-Commit-Position: refs/heads/master@{#384659}

TBR=japhet@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=597322
==========

to

==========
Revert of Fix HistoryEntry corruption when commit isn't for provisional entry.
(patchset #2 id:20001 of https://codereview.chromium.org/1848103004/ )

Reason for revert:
This led to crashes in HistoryController::UpdateForCommit if there is no current
entry and the provisional entry doesn't match the commit.  See
https://crbug.com/600238.  I'll land an updated fix.

Original issue's description:
> Fix HistoryEntry corruption when commit isn't for provisional entry.
>
> BUG=597322
> TEST=See bug for repro steps.
>
> Committed: https://crrev.com/bb3548ef2fcdb58f9bc638bb5a3c379320fdd0e0
> Cr-Commit-Position: refs/heads/master@{#384659}

TBR=japhet@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=597322

Committed: https://crrev.com/413fc09a3fa2e915410d39034d78661837468633
Cr-Commit-Position: refs/heads/master@{#384938}
==========

[commit-bot: I haz the power, 2016-04-04 17:45:18]

Patchset 1 (id:??) landed as
https://crrev.com/413fc09a3fa2e915410d39034d78661837468633
Cr-Commit-Position: refs/heads/master@{#384938}