Move special code for 'shape-outside' out of StyleBuilderFunctions.cpp.tmpl.

There should not be special code generation for a single property, at
least not in cases where a converter can easily be used instead.

Changes:

 * Assume that 'value' is either 'none', an image value, or a list of
   values.
 * Use primitive value mapping for CSSBoxType, since parser ensures
   that only valid values go though.

R=timloh@chromium.org

Review URL: https://codereview.chromium.org/645073003

git-svn-id: svn://svn.chromium.org/blink/trunk@183982 bbb929c8-8fbe-4397-9dbb-9b2b20218538
4 files changed