Some minor touch-ups to the SVG content-model test framework

* Update references to filter spec. and make feDropShadow a proper
  filter primitive.
* Rename needChld to needChild.
* Sync tags table and classes with SVG2.
* Minor simplifications to class expansion and child-creation.

Review URL: https://codereview.chromium.org/1006863002

git-svn-id: svn://svn.chromium.org/blink/trunk@191856 bbb929c8-8fbe-4397-9dbb-9b2b20218538
3 files changed
tree: e50b77a9ad7b8f6bc1ff68b9f0250fbe72032eb7
  1. third_party/