Error reporting for SVGLength and SVGLengthList

Error reporting for SVGLength and SVGLengthList

LoFi error reporting for SVGLength (LoFi because it uses the CSS
parser, and hence can't provide locus information.)
Minor cleanup in SVGLengthList, hoisting the call to clear().
Adding SVGParsingError::offsetWith to support the nested parsing going
on in SVGLengthList.

BUG=231612
Committed: https://crrev.com/d12b659e6ab8c9c2cf44fa14c407627afee10e5b
Cr-Commit-Position: refs/heads/master@{#371288}

[fs, 2016-01-25 19:21:24]

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

[fs, 2016-01-25 19:21:25]

Not the best error reporting, but at least the message is more specific...

(https://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel...)

[pdr., 2016-01-25 19:41:55]

On 2016/01/25 at 19:21:25, fs wrote:
> Not the best error reporting, but at least the message is more specific...
> 
>
(https://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel...)

LGTM

[f(malita), 2016-01-25 19:43:51]

lgtm

[fs, 2016-01-25 19:45:41]

The CQ bit was checked by fs@opera.com

[commit-bot: I haz the power, 2016-01-25 19:46:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1636503003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1636503003/20001

[commit-bot: I haz the power, 2016-01-25 19:58:00]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-01-25 19:59:04]

Description was changed from

==========
Error reporting for SVGLength and SVGLengthList

LoFi error reporting for SVGLength (LoFi because it uses the CSS
parser, and hence can't provide locus information.)
Minor cleanup in SVGLengthList, hoisting the call to clear().
Adding SVGParsingError::offsetWith to support the nested parsing going
on in SVGLengthList.

BUG=231612
==========

to

==========
Error reporting for SVGLength and SVGLengthList

LoFi error reporting for SVGLength (LoFi because it uses the CSS
parser, and hence can't provide locus information.)
Minor cleanup in SVGLengthList, hoisting the call to clear().
Adding SVGParsingError::offsetWith to support the nested parsing going
on in SVGLengthList.

BUG=231612

Committed: https://crrev.com/d12b659e6ab8c9c2cf44fa14c407627afee10e5b
Cr-Commit-Position: refs/heads/master@{#371288}
==========

[commit-bot: I haz the power, 2016-01-25 19:59:05]

Patchset 2 (id:??) landed as
https://crrev.com/d12b659e6ab8c9c2cf44fa14c407627afee10e5b
Cr-Commit-Position: refs/heads/master@{#371288}