Revert of [ios] Refactored back-forward navigation in CRWSessionController.

Revert of [ios] Refactored back-forward navigation in CRWSessionController. (patchset #5 id:80001 of https://codereview.chromium.org/2470913007/ )

Reason for revert:
GoDelta test fails on 32-bit platform

Original issue's description:
> [ios] Refactored back-forward navigation in CRWSessionController.
>
> Notable changes:
>  - Added public -[CRWSessionController indexOfEntryForDelta:] which will
>    be used in future BF navigation refactorings (crbug.com/661858). This
>    API will allow to tell the future navigation index w/o making an
>    actual navigation and pass that future entry to
>    |isSameDocumentNavigationBetweenEntry:andEntry:| call.
>  - Made goDelta: no-op if delta is out of bounds. This make
>    CRWSessionController  implementation better conform to w3 spec:
>    https://www.w3.org/TR/html5/browsers.html#the-history-interface
>  - Added public canGoDelta: API and use it in canGoBack/canGoForward.
>  - goBack and goForward now implemented by calling goDelta:-1 and
>    goDelta:1. This way the implementation is more efficient (no extra
>    calls of |discardNonCommittedEntries| and |discardTransientEntry|)
>    and cleaner.
>  - Do not change previousNavigationIndex if navigation did not happen.
>  - Added more unit tests.
>
> Further cleanups (like reusing indexOfEntryForDelta: and
> isRedirectTransitionForEntryAtIndex:) will be done in separate CLs.
>
> BUG=661820
>
> Committed: https://crrev.com/44dc0832429cf6754c254739d4939382e5ee3b71
> Cr-Commit-Position: refs/heads/master@{#430435}

TBR=kkhorimoto@chromium.org,rohitrao@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=661820
Committed: https://crrev.com/300b8d4cd1c946373960c9e0f903b704bed36d41
Cr-Commit-Position: refs/heads/master@{#430506}

[Eugene But (OOO till 7-30), 2016-11-08 03:40:18]

The CQ bit was checked by eugenebut@chromium.org

[Eugene But (OOO till 7-30), 2016-11-08 03:40:19]

Created Revert of [ios] Refactored back-forward navigation in
CRWSessionController.

[commit-bot: I haz the power, 2016-11-08 03:40:34]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-08 03:42:08]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-08 03:45:16]

Description was changed from

==========
Revert of [ios] Refactored back-forward navigation in CRWSessionController.
(patchset #5 id:80001 of https://codereview.chromium.org/2470913007/ )

Reason for revert:
GoDelta test fails on 32-bit platform

Original issue's description:
> [ios] Refactored back-forward navigation in CRWSessionController.
> 
> Notable changes:
>  - Added public -[CRWSessionController indexOfEntryForDelta:] which will
>    be used in future BF navigation refactorings (crbug.com/661858). This
>    API will allow to tell the future navigation index w/o making an
>    actual navigation and pass that future entry to
>    |isSameDocumentNavigationBetweenEntry:andEntry:| call.
>  - Made goDelta: no-op if delta is out of bounds. This make
>    CRWSessionController  implementation better conform to w3 spec:
>    https://www.w3.org/TR/html5/browsers.html#the-history-interface
>  - Added public canGoDelta: API and use it in canGoBack/canGoForward.
>  - goBack and goForward now implemented by calling goDelta:-1 and
>    goDelta:1. This way the implementation is more efficient (no extra
>    calls of |discardNonCommittedEntries| and |discardTransientEntry|)
>    and cleaner.
>  - Do not change previousNavigationIndex if navigation did not happen.
>  - Added more unit tests.
> 
> Further cleanups (like reusing indexOfEntryForDelta: and
> isRedirectTransitionForEntryAtIndex:) will be done in separate CLs.
> 
> BUG=661820
> 
> Committed: https://crrev.com/44dc0832429cf6754c254739d4939382e5ee3b71
> Cr-Commit-Position: refs/heads/master@{#430435}

TBR=kkhorimoto@chromium.org,rohitrao@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=661820
==========

to

==========
Revert of [ios] Refactored back-forward navigation in CRWSessionController.
(patchset #5 id:80001 of https://codereview.chromium.org/2470913007/ )

Reason for revert:
GoDelta test fails on 32-bit platform

Original issue's description:
> [ios] Refactored back-forward navigation in CRWSessionController.
>
> Notable changes:
>  - Added public -[CRWSessionController indexOfEntryForDelta:] which will
>    be used in future BF navigation refactorings (crbug.com/661858). This
>    API will allow to tell the future navigation index w/o making an
>    actual navigation and pass that future entry to
>    |isSameDocumentNavigationBetweenEntry:andEntry:| call.
>  - Made goDelta: no-op if delta is out of bounds. This make
>    CRWSessionController  implementation better conform to w3 spec:
>    https://www.w3.org/TR/html5/browsers.html#the-history-interface
>  - Added public canGoDelta: API and use it in canGoBack/canGoForward.
>  - goBack and goForward now implemented by calling goDelta:-1 and
>    goDelta:1. This way the implementation is more efficient (no extra
>    calls of |discardNonCommittedEntries| and |discardTransientEntry|)
>    and cleaner.
>  - Do not change previousNavigationIndex if navigation did not happen.
>  - Added more unit tests.
>
> Further cleanups (like reusing indexOfEntryForDelta: and
> isRedirectTransitionForEntryAtIndex:) will be done in separate CLs.
>
> BUG=661820
>
> Committed: https://crrev.com/44dc0832429cf6754c254739d4939382e5ee3b71
> Cr-Commit-Position: refs/heads/master@{#430435}

TBR=kkhorimoto@chromium.org,rohitrao@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=661820

Committed: https://crrev.com/300b8d4cd1c946373960c9e0f903b704bed36d41
Cr-Commit-Position: refs/heads/master@{#430506}
==========

[commit-bot: I haz the power, 2016-11-08 03:45:17]

Patchset 1 (id:??) landed as
https://crrev.com/300b8d4cd1c946373960c9e0f903b704bed36d41
Cr-Commit-Position: refs/heads/master@{#430506}