Improve gpu tracing when applying markers directly to gpu target
- Change the debug marker strings sent by the GrGpuGL target to only grab the last object
added to the set of active markers. This improves the readability when we end up with a
large stack of trace markers. Any trace markers the come from the IODB will continue to
be squashed into a single debug marker
- Added some more useful, high level markers
BUG=skia:
R=bsalomon@google.com
Author: egdaniel@google.com
Review URL: https://codereview.chromium.org/378933002
6 files changed