Expose the SVG path normalizer in SVGPathParser.h

Expose the SVG path normalizer in SVGPathParser.h

Rename the internal NormalizingConsumer to SVGPathNormalizer and move
the class declaration to SVGPathParser.h. This will allow simplifying
the "path processor" (SVGPathParser) a bit in later CLs.
Also modify the normalizer so that it normalizes into a new
PathSegmentData, to make it more "stackable" and reusable.

BUG=467592
Committed: https://crrev.com/7b2566560022cdec110c2ec09068723ccc969a16
Cr-Commit-Position: refs/heads/master@{#361199}

[fs, 2015-11-23 18:54:57]

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

[fs, 2015-11-23 18:54:57]

I compared the generated code for
SVGPathNormalizer/NormalizingConsumer::emitSegment (the same size!) and did not
see any obvious deficiencies (beyond the spilling to stack in the new version.)
It's really (unrelated) collateral damage and more of puristical nicety so far
though, so it can be dropped if so.

[pdr., 2015-11-23 18:58:09]

LGTM

Curious.. is there a path towards removing the normalized path concept?

[fs, 2015-11-23 19:32:48]

On 2015/11/23 at 18:58:09, pdr wrote:
> LGTM
> 
> Curious.. is there a path towards removing the normalized path concept?

*looks into crystal ball*

I see white horse carrying a white knight slaying the dragon of normalization!

Uhm, no, that was the TV...

To remove it we'd need to be able do "path queries" and build Path objects
without. Not entirely impossible I think. I plan to move it closer to its
consumers as a first step at least.

[fs, 2015-11-23 20:05:18]

The CQ bit was checked by fs@opera.com

[commit-bot: I haz the power, 2015-11-23 20:09:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1472853005/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1472853005/20001

[commit-bot: I haz the power, 2015-11-23 22:13:00]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-11-23 22:14:00]

Patchset 2 (id:??) landed as
https://crrev.com/7b2566560022cdec110c2ec09068723ccc969a16
Cr-Commit-Position: refs/heads/master@{#361199}