GitLab

Timings on z620:

Without:

GYP_DEFINES=component=static_library chromium_win_pch=0 incremental_chrome_dll=0

touch content\app\main.cc (causes chrome.dll, chrome_child.dll, and unit_tests.exe to relink)
tim ninja -C out\Release unit_tests
[19/19] LINK_EMBED unit_tests.exe

real: 4m46.828s

With:

GYP_DEFINES=component=static_library branding=Chrome chromium_win_pch=0 incremental_chrome_dll=1

touch content\app\content_main.cc && tim ninja -C out\Release unit_tests
ninja: Entering directory `out\Release'
[19/19] LINK_EMBED unit_tests.exe

real: 0m43.625s

This is basically best case, and the actual performance on bots will differ based on
their config and the number of files that change from run-to-run, but it seems worth
enabling to see what happens, at least.

R=jam@chromium.org
BUG=404809,402270

Review URL: https://codereview.chromium.org/502993005

Cr-Commit-Position: refs/heads/master@{#295786}