docs: Future-proof gitiles/codesearch links in infra docs.

HEAD will safely handle master -> main switches.

This also fixes broken links due to 'scripts/slave' move in tools/build.

Bug: None
Change-Id: I8c92c0af5d11e2ed251356d8458732e612ce98dd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2774227
Auto-Submit: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Stephen Martinis <martiniss@chromium.org>
Reviewed-by: Stephen Martinis <martiniss@chromium.org>
Cr-Commit-Position: refs/heads/master@{#864705}

docs/infra/cq.md

@@ -54,7 +54,7 @@ The Chromium CQ supports a variety of options that can change what it checks.
 
 * `Tbr: <username>`
 
-  [See policy](https://chromium.googlesource.com/chromium/src/+/master/docs/code_reviews.md#TBR-To-Be-Reviewed)
+  [See policy](https://chromium.googlesource.com/chromium/src/+/HEAD/docs/code_reviews.md#TBR-To-Be-Reviewed)
   of when it's acceptable to use TBR ("To be reviewed"). If a change has a TBR
   line with a valid reviewer, the CQ will skip checks for LGTMs.
 

docs/infra/new_builder.md

@@ -357,13 +357,13 @@ reach out to infra-dev@chromium.org or [file a bug][19]!
 [1]: http://go/file-chrome-resource-bug
 [3]: https://bit.ly/chromium-build-naming
 [4]: https://luci-config.appspot.com/#/services/chromium-swarm
-[5]: https://chromium.googlesource.com/chromium/tools/build/+/master/scripts/slave/recipe_modules/chromium_tests
+[5]: https://chromium.googlesource.com/chromium/tools/build/+/HEAD/recipes/recipe_modules/chromium_tests
 [6]: /infra/config
 [7]: https://luci-config.appspot.com/schemas/projects:cr-buildbucket.cfg
 [8]: /infra/config/generated/cr-buildbucket.cfg
 [9]: http://luci-config.appspot.com/schemas/projects:luci-milo.cfg
 [10]: /infra/config/generated/luci-milo.cfg
-[11]: https://chromium.googlesource.com/infra/luci/luci-go/+/master/scheduler/appengine/messages/config.proto
+[11]: https://chromium.googlesource.com/infra/luci/luci-go/+/HEAD/scheduler/appengine/messages/config.proto
 [12]: /infra/config/generated/luci-scheduler.cfg
 [13]: /tools/mb/README.md
 [14]: /tools/mb/docs/user_guide.md#the-mb_config_pyl-config-file
@@ -372,8 +372,8 @@ reach out to infra-dev@chromium.org or [file a bug][19]!
 [17]: https://chromium.googlesource.com/chromium/tools/build
 [18]: /
 [19]: https://g.co/bugatrooper
-[20]: https://chromium.googlesource.com/infra/luci/luci-py/+/master/appengine/swarming/proto/bots.proto
-[21]: https://chromium.googlesource.com/chromium/tools/build/+/master/scripts/slave/recipe_modules/chromium_tests/trybots.py
+[20]: https://chromium.googlesource.com/infra/luci/luci-py/+/HEAD/appengine/swarming/proto/bots.proto
+[21]: https://chromium.googlesource.com/chromium/tools/build/+/HEAD/recipes/recipe_modules/chromium_tests/trybots.py
 [22]: /infra/config/main.star
 [23]: /infra/config/subprojects/chromium
 [24]: /infra/config/lib/builders.star

docs/infra/using_led.md

@@ -69,9 +69,9 @@ reach out to infra-dev@chromium.org or [file a bug][11]!
 [3]: https://chromium.googlesource.com/chromium/tools/build/
 [4]: /tools/mb/mb_config.pyl
 [5]: /testing/buildbot/
-[6]: https://chromium.googlesource.com/chromium/tools/build/+/HEAD/scripts/slave/recipe_modules/chromium_tests/trybots.py
+[6]: https://chromium.googlesource.com/chromium/tools/build/+/HEAD/recipes/recipe_modules/chromium_tests/trybots.py
 [7]: https://ci.chromium.org/p/chromium/builders/ci/linux-rel
-[8]: https://chromium.googlesource.com/chromium/tools/build/+/master/scripts/slave/recipe_modules/chromium/api.py
-[9]: https://chromium.googlesource.com/chromium/tools/build/+/master/scripts/slave/recipe_modules/chromium_tests/api.py
-[10]: https://chromium.googlesource.com/chromium/tools/build/+/master/scripts/slave/recipes.py
+[8]: https://chromium.googlesource.com/chromium/tools/build/+/HEAD/recipes/recipe_modules/chromium/api.py
+[9]: https://chromium.googlesource.com/chromium/tools/build/+/HEAD/recipes/recipe_modules/chromium_tests/api.py
+[10]: https://chromium.googlesource.com/chromium/tools/build/+/HEAD/recipes/recipes.py
 [11]: https://g.co/bugatrooper

docs/infra/watchlists.md

@@ -71,6 +71,6 @@ python ../depot_tools/watchlists.py PATH/TO/FILE1 PATH/TO/FILE2 ....
 To override watchlist processing, use `git cl upload` with `--bypass-hooks`.
 
 [//]: # (the reference link section should be alphabetically sorted)
-[skia-autoroller]: https://skia.googlesource.com/buildbot/+/master/autoroll/README.md
+[skia-autoroller]: https://skia.googlesource.com/buildbot/+/HEAD/autoroll/README.md
 [crbug-982198]: https://bugs.chromium.org/p/chromium/issues/detail?id=982198
-[roller-configs]: https://skia.googlesource.com/buildbot/+/master/autoroll/config
+[roller-configs]: https://skia.googlesource.com/buildbot/+/HEAD/autoroll/config