Parse {animation,transition}-{delay,duration} in CSSPropertyParser with CSSParserTokens

Parse {animation,transition}-{delay,duration} in CSSPropertyParser with CSSParserTokens

This patch moves the parsing logic for following properties out of the
LegacyCSSPropertyParser and into the CSSPropertyParser:
animation-delay
animation-duration
transition-delay
transition-duration

This logic is still required in the legacy property parser until the
animation and transition shorthands are moved across.

BUG=499780
Committed: https://crrev.com/5512a574caa535f56baf444b7e1aadecf4f92691
Cr-Commit-Position: refs/heads/master@{#354989}

[Timothy Loh, 2015-10-19 05:57:41]

timloh@chromium.org changed reviewers:
+ alancutter@chromium.org, rob.buis@samsung.com

[rwlbuis, 2015-10-19 17:17:56]

lgtm with one remark.

https://codereview.chromium.org/1410343002/diff/1/third_party/WebKit/Source/c...
File third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp (right):

https://codereview.chromium.org/1410343002/diff/1/third_party/WebKit/Source/c...
third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp:344: switch
(token.unitType()) {
Would be more compact to use an if statement here. Not sure if the generated
code would be any different.

[Timothy Loh, 2015-10-20 05:19:21]

The CQ bit was checked by timloh@chromium.org

[Timothy Loh, 2015-10-20 05:19:21]

The patchset sent to the CQ was uploaded after l-g-t-m from rob.buis@samsung.com
Link to the patchset: https://codereview.chromium.org/1410343002/#ps20001
(title: "address review comments")

[commit-bot: I haz the power, 2015-10-20 05:19:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1410343002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1410343002/20001

[commit-bot: I haz the power, 2015-10-20 05:53:04]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-10-20 05:53:43]

Patchset 2 (id:??) landed as
https://crrev.com/5512a574caa535f56baf444b7e1aadecf4f92691
Cr-Commit-Position: refs/heads/master@{#354989}