Instrumented libraries: remove unnecessary uses of DEPTH from GYP.

This was not working correctly in WebRTC builds.

Also, add -fno-omit-frame-pointer to CFLAGS. Both changes will cause a complete
rebuild of all instrumented libraries, so I bundled them together.

BUG=394251
TBR=glider@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/619723006

Cr-Original-Commit-Position: refs/heads/master@{#297652}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 138ba3ed4f3a93e7bab569aa9d2e3ff4ff4fe5a5
2 files changed