Avoid repeated code when building SVG help tables.

Avoid repeated code when building SVG help tables.

This saves roughly 6 KB of code.

  Grown symbols:
       +123: blink::SVGFontFaceElement::parseAttribute(blink::QualifiedName const&, WTF::AtomicString const&) type=t, (was 330 bytes, now 453 bytes)
  Removed symbols:
        -94: blink::mapAttributeToCSSProperty(WTF::HashMap<WTF::StringImpl*, blink::CSSPropertyID, WTF::StringHash, WTF::HashTraits<WTF::StringImpl*>, WTF::HashTraits<blink::CSSPropertyID>, WTF::DefaultAllocator>*, blink::QualifiedName const&) type=t, size=94 bytes
  Shrunk symbols:
      -2121: blink::SVGElement::animatedPropertyTypeForCSSAttribute(blink::QualifiedName const&) type=t, (was 3795 bytes, now 1674 bytes)
      -3786: blink::SVGElement::cssPropertyIdForSVGAttributeName(blink::QualifiedName const&) type=t, (was 5076 bytes, now 1290 bytes)

R=fs@opera.com
BUG=

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=182903

[Daniel Bratell, 2014-09-26 14:15:24]

bratell@opera.com changed reviewers:
+ fs@opera.com

[Daniel Bratell, 2014-09-26 14:15:33]

bratell@opera.com changed reviewers:
+ ed@opera.com

[fs, 2014-09-30 08:38:40]

lgtm

[Daniel Bratell, 2014-09-30 09:35:57]

The CQ bit was checked by bratell@opera.com

[commit-bot: I haz the power, 2014-09-30 09:36:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/610593002/1

[commit-bot: I haz the power, 2014-09-30 10:13:16]

Committed patchset #1 (id:1) as 182903