Add a TRACE_EVENT for SkGpuBlurUtils::GaussianBlur

This function has been found to have strong influence over UI
performance for the Fuchsia project (in both the GPU work it goes on to
create, and the execution of the function itself when shader compilation
is required).  Add a trace event for it to increase its visibility in
traces.

Change-Id: Ia29cc26fc047d03fb0a4db48dae5ea2ebcd07099
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/230017
Commit-Queue: Robert Phillips <robertphillips@google.com>
Auto-Submit: Nathan Rogers <nathanrogers@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
1 file changed