SVG Web Animations: Support targeting presentation attributes

This change adds support for animating the following SVG presentation
attributes via element.animate():
 - alignment-baseline
 - baseline-shift
 - buffered-rendering
 - clip-path
 - clip-rule
 - color
 - color-interpolation
 - color-interpolation-filters
 - color-rendering
 - cursor
 - display
 - dominant-baseline
 - fill
 - fill-opacity
 - fill-rule
 - filter
 - flood-color
 - flood-opacity
 - font-family
 - font-size
 - font-stretch
 - font-style
 - font-variant
 - font-weight
 - image-rendering
 - letter-spacing
 - lighting-color
 - marker-end
 - marker-mid
 - marker-start
 - mask
 - mask-type
 - opacity
 - overflow
 - paint-order
 - pointer-events
 - shape-rendering
 - stop-color
 - stop-opacity
 - stroke
 - stroke-dasharray
 - stroke-dashoffset
 - stroke-linecap
 - stroke-linejoin
 - stroke-miterlimit
 - stroke-opacity
 - stroke-width
 - text-anchor
 - text-decoration
 - text-rendering
 - vector-effect
 - visibility
 - word-spacing

These animations are backed by existing CSS animation InterpolationTypes.
This change accomplishes this by aliasing these as their CSS property
counterparts. This introduces a bug where animations targeting the
real CSS properties should override any animations targeting the
presentation attributes but they don't since they're being treated
as equals. The css-animation-overrides-svg-presentation-attribute-animation.html
test case covers this corner case issue.

BUG=548232

Review URL: https://codereview.chromium.org/1525623005

Cr-Commit-Position: refs/heads/master@{#366323}

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