Remove the workaround for missing gobject-introspection bindings of Rsvg

gobject introspection bindings for librsvg have been pushed to librsvg
master [1] in 2.35.0, which solved [2]. We only have slight adopts to
make in our usage, for example we can not pass the data property
to the default constructor anymore and get_width and get_height is not
available anymore for the handle, but we can use the properties
instead.

The sugar-toolkit-gtk3 and therefore Activities that have been ported
to it do need a version of librsvg >= 2.35.0 to be able to work,
which ships for example with Fedora 17.

Signed-off-by: Simon Schampijer <simon@laptop.org>
Acked-by: Daniel Drake <dsd@laptop.org>

[1] http://git.gnome.org/browse/librsvg/
[2] https://bugzilla.gnome.org/show_bug.cgi?id=663049
[3] http://developer.gnome.org/rsvg/stable/RsvgHandle.html

src/sugar3/graphics/icon.py

@@ -29,14 +29,13 @@ from gi.repository import GObject
 from gi.repository import Gtk
 from gi.repository import Gdk
 from gi.repository import GdkPixbuf
+from gi.repository import Rsvg
 import cairo
 
 from sugar3.graphics import style
 from sugar3.graphics.xocolor import XoColor
 from sugar3.util import LRU
 
-from gi.repository import SugarExt
-
 _BADGE_SIZE = 0.45
 
 
@@ -64,7 +63,7 @@ class _SVGLoader(object):
                 logging.error(
                     'Icon %s, entity %s is invalid.', file_name, entity)
 
-        return SugarExt.RsvgWrapper.new(icon)
+        return Rsvg.Handle.new_from_data(icon)
 
 
 class _IconInfo(object):
@@ -260,8 +259,8 @@ class _IconBuffer(object):
 
         if is_svg:
             handle = self._load_svg(icon_info.file_name)
-            icon_width = handle.get_width()
-            icon_height = handle.get_height()
+            icon_width = handle.props.width
+            icon_height = handle.props.height
         else:
             pixbuf = GdkPixbuf.Pixbuf.new_from_file(icon_info.file_name)
             icon_width = pixbuf.get_width()