Revert of Refactoring: Remove dead code in DeferredImageDecoder::createFrameAtIndex

Revert of Refactoring: Remove dead code in DeferredImageDecoder::createFrameAtIndex (patchset #1 id:1 of https://codereview.chromium.org/2225903004/ )

Reason for revert:
Crash reported at crbug.com/636829

Original issue's description:
> Refactoring: Remove dead code in DeferredImageDecoder::createFrameAtIndex
>
> DeferredImageDecoder::createFrameAtIndex is used only at
> ImageSource::createFrameAtIndex, and this is indirectly called by
> BitmapImage::frameAtIndex, which checks that the index is less than the
> number of frames. Thus, DeferredImageDecoder::createFrameAtIndex can
> assume that the given |index| is less than the number of the frames.
>
> This CL removes the dead code to improve code health.
>
> BUG=n/a
> TEST=webkit_unit_tests
>
> Committed: https://crrev.com/9a1a7dc0502f5d16b53ce50a2fd509b0ea5cf125
> Cr-Commit-Position: refs/heads/master@{#410961}

TBR=fmalita@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=n/a

Committed: https://crrev.com/3831b72130f11ebac151fd4945719f6d7489e048
Cr-Commit-Position: refs/heads/master@{#411559}

[hajimehoshi, 2016-08-12 04:34:07]

The CQ bit was checked by hajimehoshi@chromium.org

[hajimehoshi, 2016-08-12 04:34:08]

Created Revert of Refactoring: Remove dead code in
DeferredImageDecoder::createFrameAtIndex

[commit-bot: I haz the power, 2016-08-12 04:34:23]

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, 2016-08-12 05:39:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-12 05:40:59]

Description was changed from

==========
Revert of Refactoring: Remove dead code in
DeferredImageDecoder::createFrameAtIndex (patchset #1 id:1 of
https://codereview.chromium.org/2225903004/ )

Reason for revert:
Crash reported at crbug.com/636829

Original issue's description:
> Refactoring: Remove dead code in DeferredImageDecoder::createFrameAtIndex
> 
> DeferredImageDecoder::createFrameAtIndex is used only at
> ImageSource::createFrameAtIndex, and this is indirectly called by
> BitmapImage::frameAtIndex, which checks that the index is less than the
> number of frames. Thus, DeferredImageDecoder::createFrameAtIndex can
> assume that the given |index| is less than the number of the frames.
> 
> This CL removes the dead code to improve code health.
> 
> BUG=n/a
> TEST=webkit_unit_tests
> 
> Committed: https://crrev.com/9a1a7dc0502f5d16b53ce50a2fd509b0ea5cf125
> Cr-Commit-Position: refs/heads/master@{#410961}

TBR=fmalita@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=n/a
==========

to

==========
Revert of Refactoring: Remove dead code in
DeferredImageDecoder::createFrameAtIndex (patchset #1 id:1 of
https://codereview.chromium.org/2225903004/ )

Reason for revert:
Crash reported at crbug.com/636829

Original issue's description:
> Refactoring: Remove dead code in DeferredImageDecoder::createFrameAtIndex
>
> DeferredImageDecoder::createFrameAtIndex is used only at
> ImageSource::createFrameAtIndex, and this is indirectly called by
> BitmapImage::frameAtIndex, which checks that the index is less than the
> number of frames. Thus, DeferredImageDecoder::createFrameAtIndex can
> assume that the given |index| is less than the number of the frames.
>
> This CL removes the dead code to improve code health.
>
> BUG=n/a
> TEST=webkit_unit_tests
>
> Committed: https://crrev.com/9a1a7dc0502f5d16b53ce50a2fd509b0ea5cf125
> Cr-Commit-Position: refs/heads/master@{#410961}

TBR=fmalita@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=n/a

Committed: https://crrev.com/3831b72130f11ebac151fd4945719f6d7489e048
Cr-Commit-Position: refs/heads/master@{#411559}
==========

[commit-bot: I haz the power, 2016-08-12 05:41:00]

Patchset 1 (id:??) landed as
https://crrev.com/3831b72130f11ebac151fd4945719f6d7489e048
Cr-Commit-Position: refs/heads/master@{#411559}