Chrome OS: Reduce NOTREACHED() overhead for release builds.

For Chrome OS release builds, implement a dedicated LogErrorNotReached() function to reduce
the number of function calls per NOTREACHED() call site from 5+ to 1 and drop custom messages that are appended to NOTREACHED().  (Release builds on other platforms drop NOTREACHED() altogether, so no changes there.)

This change reduces the size of my chromeos=1 executable by 1.7 MB (ca. 1%).


Review URL:

Cr-Commit-Position: refs/heads/master@{#331249}
2 files changed