Hoist some pre-condition checks out of SVGAngle/SVGEnumeration

Hoist some pre-condition checks out of SVGAngle/SVGEnumeration

This moves checking of values closer to the "DOM" part of the API.

Committed: https://crrev.com/a0c40ee34f7301e0aad8e1876b6c68c9f8e7e77c
Cr-Commit-Position: refs/heads/master@{#355862}

[fs, 2015-10-23 17:45:24]

Description was changed from

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Hoist some pre-condition checks out of SVGAngle/SVGEnumeration
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to

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Hoist some pre-condition checks out of SVGAngle/SVGEnumeration

This moves checking of values closer to the "DOM" part of the API.
==========

[fs, 2015-10-23 17:45:24]

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

[pdr., 2015-10-23 19:43:46]

The CQ bit was checked by pdr@chromium.org

[pdr., 2015-10-23 19:43:48]

lgtm

[commit-bot: I haz the power, 2015-10-23 19:44:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1412713004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1412713004/1

[commit-bot: I haz the power, 2015-10-23 19:49:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-23 19:50:01]

Patchset 1 (id:??) landed as
https://crrev.com/a0c40ee34f7301e0aad8e1876b6c68c9f8e7e77c
Cr-Commit-Position: refs/heads/master@{#355862}