[Code Coverage] Configure mac-code-coverage.

This is a builder that will build instrumented versions of chromium
gtests on Mac, run them on Mac 10.13 no-gpu bots and upload code
coverage reports to the coverage dashboard.

Later changes will include non-gtest tests and tweak sharding parameters
for this configuration.

R=sajjadm,nodir,liaoyuke

Bug: 1017486
Change-Id: Ie2168653ede5e37498ac9cf62e54a29883173b1f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1877604Reviewed-by: Aaron Gable <agable@chromium.org>
Reviewed-by: Yuke Liao <liaoyuke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710084}

infra/config/buckets/ci.star

@@ -1259,10 +1259,12 @@ fyi_coverage_builder(
 )
 
 fyi_coverage_builder(
-    name = 'mac-code-coverage-generation',
+    name = 'mac-code-coverage',
+    builderless = True,
     cores = 24,
     goma_backend = goma.backend.RBE_PROD,
-    os = None,
+    os = os.MAC_ANY,
+    ssd = True,
     use_clang_coverage = True,
 )
 

infra/config/consoles/chromium.fyi.star

@@ -28,7 +28,7 @@ luci.console_view(
             short_name = 'lcr',
         ),
         luci.console_view_entry(
-            builder = 'ci/mac-code-coverage-generation',
+            builder = 'ci/mac-code-coverage',
             category = 'code_coverage',
             short_name = 'mac',
         ),

infra/config/consoles/chromium.goma.migration.star

@@ -478,7 +478,7 @@ luci.console_view(
             short_name = 'pie',
         ),
         luci.console_view_entry(
-            builder = 'ci/mac-code-coverage-generation',
+            builder = 'ci/mac-code-coverage',
             category = 'week3c|mac',
             short_name = 'code',
         ),

infra/config/generated/cr-buildbucket.cfg

@@ -9037,12 +9037,14 @@ buckets: <
       service_account: "chromium-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
     >
     builders: <
-      name: "mac-code-coverage-generation"
+      name: "mac-code-coverage"
       swarming_host: "chromium-swarm.appspot.com"
       swarming_tags: "vpython:native-python-wrapper"
-      dimensions: "builder:mac-code-coverage-generation"
+      dimensions: "builderless:1"
       dimensions: "cores:24"
       dimensions: "cpu:x86-64"
+      dimensions: "os:Mac"
+      dimensions: "ssd:1"
       recipe: <
         name: "chromium"
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"

infra/config/generated/luci-milo.cfg

@@ -2840,7 +2840,7 @@ consoles: <
     short_name: "lcr"
   >
   builders: <
-    name: "buildbucket/luci.chromium.ci/mac-code-coverage-generation"
+    name: "buildbucket/luci.chromium.ci/mac-code-coverage"
     category: "code_coverage"
     short_name: "mac"
   >
@@ -4859,7 +4859,7 @@ consoles: <
     short_name: "pie"
   >
   builders: <
-    name: "buildbucket/luci.chromium.ci/mac-code-coverage-generation"
+    name: "buildbucket/luci.chromium.ci/mac-code-coverage"
     category: "week3c|mac"
     short_name: "code"
   >

infra/config/generated/luci-scheduler.cfg

@@ -381,7 +381,7 @@ trigger {
   triggers: "linux-wpt-fyi-rel"
   triggers: "linux-trusty-rel"
   triggers: "linux-win_cross-rel"
-  triggers: "mac-code-coverage-generation"
+  triggers: "mac-code-coverage"
   triggers: "mac-archive-dbg"
   triggers: "mac-hermetic-upgrade-rel"
   triggers: "mac-mojo-rel"
@@ -2363,12 +2363,12 @@ job {
 }
 
 job {
-  id: "mac-code-coverage-generation"
+  id: "mac-code-coverage"
   acl_sets: "default"
   buildbucket: {
     server: "cr-buildbucket.appspot.com"
     bucket: "luci.chromium.ci"
-    builder: "mac-code-coverage-generation"
+    builder: "mac-code-coverage"
   }
 }
 

infra/config/luci-scheduler.cfg

@@ -381,7 +381,7 @@ trigger {
   triggers: "linux-wpt-fyi-rel"
   triggers: "linux-trusty-rel"
   triggers: "linux-win_cross-rel"
-  triggers: "mac-code-coverage-generation"
+  triggers: "mac-code-coverage"
   triggers: "mac-archive-dbg"
   triggers: "mac-hermetic-upgrade-rel"
   triggers: "mac-mojo-rel"
@@ -2363,12 +2363,12 @@ job {
 }
 
 job {
-  id: "mac-code-coverage-generation"
+  id: "mac-code-coverage"
   acl_sets: "default"
   buildbucket: {
     server: "cr-buildbucket.appspot.com"
     bucket: "luci.chromium.ci"
-    builder: "mac-code-coverage-generation"
+    builder: "mac-code-coverage"
   }
 }
 

testing/buildbot/waterfalls.pyl

@@ -1932,6 +1932,16 @@
           'gtest_tests': 'goma_mac_gtests',
         },
       },
+      'mac-code-coverage': {
+        'mixins': [
+          'code-coverage',
+          'mac_10.13',
+          'no_gpu',
+        ],
+        'test_suites': {
+          'gtest_tests': 'chromium_mac_gtests',
+        },
+      },
       'mac-hermetic-upgrade-rel': {
         'additional_compile_targets': [
           'all'

tools/mb/mb_config.pyl

@@ -309,6 +309,7 @@
       'Mac deterministic': 'release_bot_mac_strip_minimal_symbols_deterministic',
       'Mac deterministic (dbg)': 'debug_bot_deterministic',
       'mac-autofill-captured-sites-rel': 'release_bot',
+      'mac-code-coverage': 'clang_code_coverage_nofuzzer',
 
       'android-mojo-webview-rel': 'android_release_bot_minimal_symbols_arm64',
       'Mojo ChromiumOS': 'chromeos_with_codecs_release_trybot',