add default impl for context methods on shader
These are reasonable return values, since both of these methods can return a known value (0)
which means that no context can be created. This also makes it easier for chrome's subclasses
which already do not want to create a context, but having them actually overridden makes
changing the virtual signatures much harder.
BUG=skia:
R=scroggo@google.com, dominikg@google.com, reed@chromium.org
Author: reed@google.com
Review URL: https://codereview.chromium.org/262703002
git-svn-id: http://skia.googlecode.com/svn/trunk/src@14491 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed
