Don't decompose retargeted rotate() transform transitions

Don't decompose retargeted rotate() transform transitions

2D rotate() transform operations were always interpolating as 3D rotate()
operations.
This resulted in interpolations between interpolated 2D rotate()s and
matching 2D rotate()s using matrix decomposition as the operation
types no longer matched.

This change ensures non-matrix-decomposition interpolation between
rotate() operations produces the same type of rotate() operation.

BUG=605021
Review URL: https://codereview.chromium.org/1909863002

Cr-Commit-Position: refs/heads/master@{#389696}
(cherry picked from commit b721ba4c7c32b789911cdf125f4871f9b442320b)

Committed: https://chromium.googlesource.com/chromium/src/+/127afd1b0ee3a6c937e23cd3807f2f144789e41c

[alancutter (OOO until 2018), 2016-04-29 04:03:20]

Description was changed from

==========
Don't decompose retargeted rotate() transform transitions

2D rotate() transform operations were always interpolating as 3D rotate()
operations.
This resulted in interpolations between interpolated 2D rotate()s and
matching 2D rotate()s using matrix decomposition as the operation
types no longer matched.

This change ensures non-matrix-decomposition interpolation between
rotate() operations produces the same type of rotate() operation.

BUG=605021

Review URL: https://codereview.chromium.org/1909863002

Cr-Commit-Position: refs/heads/master@{#389696}
(cherry picked from commit b721ba4c7c32b789911cdf125f4871f9b442320b)
==========

to

==========
Don't decompose retargeted rotate() transform transitions

2D rotate() transform operations were always interpolating as 3D rotate()
operations.
This resulted in interpolations between interpolated 2D rotate()s and
matching 2D rotate()s using matrix decomposition as the operation
types no longer matched.

This change ensures non-matrix-decomposition interpolation between
rotate() operations produces the same type of rotate() operation.

BUG=605021

Review URL: https://codereview.chromium.org/1909863002

Cr-Commit-Position: refs/heads/master@{#389696}
(cherry picked from commit b721ba4c7c32b789911cdf125f4871f9b442320b)

Committed:
https://chromium.googlesource.com/chromium/src/+/127afd1b0ee3a6c937e23cd3807f...
==========

[alancutter (OOO until 2018), 2016-04-29 04:03:23]

Committed patchset #1 (id:1) manually as
127afd1b0ee3a6c937e23cd3807f2f144789e41c.