IDL: Support optional argument default value syntax
Adds support for parsing default values of different types, but
only handles null default values when generating code.
Replaces existing
[Default=Null] optional SomeInterface arg
[Default=NullString] optional DOMString arg
with the now equivalent
optional SomeInterface arg = null
optional DOMString arg = null
in IDL files, and drops support for those [Default] attributes.
No changes to generated code.
BUG=258153
Review URL: https://codereview.chromium.org/312683005
git-svn-id: svn://svn.chromium.org/blink/trunk@176200 bbb929c8-8fbe-4397-9dbb-9b2b20218538
34 files changed
