GitLab

- New APIs:
  - Add a "visible" property to the Layer class to mimick the visible property of the Transform class.
  - Add a method to set an affine transform on Pattern objects so that texture patterns can be transformed independently from the Layers that use them.
  - Add a "paint operators" API for Layers and define four operators (currently only three of them implemented). The previous hard-coded behaviour was equivalent to the BLEND_WITH_TRANSPARENCY operator.
- Fixes:
  - Replace the "mask" nomenclature with "clip", which is a more standard name.
  - Don't clip alpha-blended layers.
  - Restrict Layer painting to the rectangle defined by the attributes.
  - Set default alpha value to 0.0 instead of 1.0 to match what JavaScript expects.

TEST=loaded O2D and verified all new functionality is working
BUG=none

Review URL: http://codereview.chromium.org/6255003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72006 0039d316-1c4b-4281-b951-d872f2087c98