plumbing for skia trace events into Chrome's about://tracing framework

BUG=

Review URL: https://codereview.chromium.org/153063002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249128 0039d316-1c4b-4281-b951-d872f2087c98
Use shill::kErrorResult* constants.

This CL uses shill::kErrorResult* constants to replace locally defined constants and those deprecated shill::kError*Msg constants.

BUG=256855,256889

Review URL: https://codereview.chromium.org/155523002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249129 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249129