Tidy up ComputedStyle::applyTransform

Tidy up ComputedStyle::applyTransform

Use range-based for-loops when iterating transform operations (also in
ComputedStyle::requireTransformOrigin), since it's both tidier and
avoids unnecessary index-checks (in operator[].)
Move computation of offsetX/offsetY closer to their point of usage.
Extract the size of the bounding box once, and also drop some unneeded
qualifications of enumeration values.

BUG=369942
Committed: https://crrev.com/4ae2f78aa839eb6243f84152033d5e740562b10b
Cr-Commit-Position: refs/heads/master@{#429598}

[fs, 2016-11-03 13:54:12]

The CQ bit was checked by fs@opera.com to run a CQ dry run

[commit-bot: I haz the power, 2016-11-03 13:54:35]

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

[fs, 2016-11-03 14:47:31]

fs@opera.com changed reviewers:
+ pdr@chromium.org, schenney@chromium.org

[commit-bot: I haz the power, 2016-11-03 15:03:49]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-11-03 15:03:50]

Dry run: This issue passed the CQ dry run.

[Stephen Chennney, 2016-11-03 15:41:25]

The CQ bit was checked by schenney@chromium.org

[Stephen Chennney, 2016-11-03 15:41:25]

lgtm

[commit-bot: I haz the power, 2016-11-03 15:41:45]

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, 2016-11-03 15:48:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-03 16:11:46]

Description was changed from

==========
Tidy up ComputedStyle::applyTransform

Use range-based for-loops when iterating transform operations (also in
ComputedStyle::requireTransformOrigin), since it's both tidier and
avoids unnecessary index-checks (in operator[].)
Move computation of offsetX/offsetY closer to their point of usage.
Extract the size of the bounding box once, and also drop some unneeded
qualifications of enumeration values.

BUG=369942
==========

to

==========
Tidy up ComputedStyle::applyTransform

Use range-based for-loops when iterating transform operations (also in
ComputedStyle::requireTransformOrigin), since it's both tidier and
avoids unnecessary index-checks (in operator[].)
Move computation of offsetX/offsetY closer to their point of usage.
Extract the size of the bounding box once, and also drop some unneeded
qualifications of enumeration values.

BUG=369942

Committed: https://crrev.com/4ae2f78aa839eb6243f84152033d5e740562b10b
Cr-Commit-Position: refs/heads/master@{#429598}
==========

[commit-bot: I haz the power, 2016-11-03 16:11:47]

Patchset 1 (id:??) landed as
https://crrev.com/4ae2f78aa839eb6243f84152033d5e740562b10b
Cr-Commit-Position: refs/heads/master@{#429598}