Remove 3-args |SVGAnimatedLength::baseValueToString()| impl.

Remove 3-args |SVGAnimatedLength::baseValueToString()| impl.

This CL is to prepare for auto-dispatching baseValueToString in SVG*Element::parseAttribute.
SVGAnimatedLength required {Forbid,Allow}NegativeValues setting to be passed in as an argument of baseValueToString.
This was making auto-dispatch for baseValueToString calls difficult.

This CL removes the SVGLengthNegativeValuesMode argument from |SVGAnimatedLength::baseValueToString()|. The setting is passed in by |SVGAnimatedLength| ctor.

BUG=349370
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=169648

[kouhei (in TOK), 2014-03-20 11:11:10]

Would you take a look?

[haraken, 2014-03-20 11:24:58]

LGTM

[kouhei (in TOK), 2014-03-20 11:27:00]

The CQ bit was checked by kouhei@chromium.org

[commit-bot: I haz the power, 2014-03-20 11:27:06]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/kouhei@chromium.org/206133005/1

[commit-bot: I haz the power, 2014-03-20 12:28:47]

Change committed as 169648