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This change makes the trace strings consistent with the class name. Previously,
trace names would always show as TraceGLAPI, even for the other implementations
like EGL, GLX, and WGL.

R=kbr
BUG=none

Change-Id: Id4708c0b10c300d5c8da007ef693927a46da7fa7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1951548
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Auto-Submit: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721740}