add github version of ytdevinfra config

It uses GitHub mirrow GoB. It also sets the custom vars.

R=yim@chromium.org

Bug:390703833
Change-Id: I5db6eadaeba04e6514fa0ff4e61d931690baac59
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/6219827
Auto-Submit: K. S. Yim <yim@google.com>
Reviewed-by: Yiwei Zhang <yiwzhang@google.com>
Commit-Queue: Yiwei Zhang <yiwzhang@google.com>

recipes/README.recipes.md

@@ -1109,7 +1109,7 @@ Raises:
 [DEPS](/recipes/recipe_modules/gclient/examples/full.py#7): [gclient](#recipe_modules-gclient), [recipe\_engine/assertions][recipe_engine/recipe_modules/assertions], [recipe\_engine/buildbucket][recipe_engine/recipe_modules/buildbucket], [recipe\_engine/context][recipe_engine/recipe_modules/context], [recipe\_engine/file][recipe_engine/recipe_modules/file], [recipe\_engine/path][recipe_engine/recipe_modules/path], [recipe\_engine/properties][recipe_engine/recipe_modules/properties], [recipe\_engine/step][recipe_engine/recipe_modules/step]
 
 
-— **def [RunSteps](/recipes/recipe_modules/gclient/examples/full.py#72)(api):**
+— **def [RunSteps](/recipes/recipe_modules/gclient/examples/full.py#73)(api):**
 ### *recipes* / [gclient:tests/diff\_deps](/recipes/recipe_modules/gclient/tests/diff_deps.py)
 
 [DEPS](/recipes/recipe_modules/gclient/tests/diff_deps.py#10): [gclient](#recipe_modules-gclient), [recipe\_engine/assertions][recipe_engine/recipe_modules/assertions], [recipe\_engine/buildbucket][recipe_engine/recipe_modules/buildbucket], [recipe\_engine/path][recipe_engine/recipe_modules/path], [recipe\_engine/platform][recipe_engine/recipe_modules/platform], [recipe\_engine/properties][recipe_engine/recipe_modules/properties], [recipe\_engine/raw\_io][recipe_engine/recipe_modules/raw_io]

recipes/recipe_modules/gclient/config.py

@@ -516,7 +516,6 @@ def crossbench(c):
   soln.url = 'https://chromium.googlesource.com/crossbench'
   c.got_revision_mapping['crossbench'] = 'got_revision'
 
-
 @config_ctx()
 def website(c):  # pragma: no cover
   s = c.solutions.add()
@@ -525,10 +524,21 @@ def website(c):  # pragma: no cover
   m = c.got_revision_mapping
   m['website'] = 'got_revision'
 
-
 @config_ctx()
 def ytdevinfra(c):
   soln = c.solutions.add()
   soln.name = 'ytdevinfra'
   soln.url = 'https://lbshell-internal.googlesource.com/cobalt_src.git'
   c.got_revision_mapping['ytdevinfra'] = 'got_revision'
+
+
+@config_ctx()
+def ytdevinfra_github(c):
+  soln = c.solutions.add()
+  soln.name = 'ytdevinfra_github'
+  soln.url = 'https://github.googlesource.com/youtube/cobalt.git'
+  soln.custom_vars = {
+      'download_remoteexec_cfg': True,
+      'rbe_instance': 'projects/cobalt-actions-prod/instances/default_instance'
+  }
+  c.got_revision_mapping['ytdevinfra_github'] = 'got_revision'

recipes/recipe_modules/gclient/examples/full.py

@@ -62,6 +62,7 @@ TEST_CONFIGS = [
     'with_branch_heads',
     'with_tags',
     'ytdevinfra',
+    'ytdevinfra_github',
 ]
 
 DEPS_CONTENT = """