[cq] Migrate ios-* builders to LUCI.

TBR=sdefresne@chromium.org, tandrii@chromium.org

Bug: 731542, 731544, 731354, 776178
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I79d65f73e574e11afd9b0b490edf056c0d8c90fd
Reviewed-on: https://chromium-review.googlesource.com/1062967
Reviewed-by: Sergey Berezin <sergeyberezin@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Sergey Berezin <sergeyberezin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559321}

infra/config/branch/cq.cfg

@@ -41,7 +41,22 @@ verifiers {
       builders { name: "chromium_presubmit" }
       builders { name: "fuchsia_arm64" }
       builders { name: "fuchsia_x64" }
+      # https://crbug.com/739556; make this non-experimental ASAP.
+      builders {
+        name: "ios-device"
+        experiment_percentage: 10
+      }
+      # https://crbug.com/739556
+      builders {
+        name: "ios-device-xcode-clang"
+        experiment_percentage: 10
+      }
       builders { name: "ios-simulator" }
+      # https://crbug.com/739556
+      builders {
+        name: "ios-simulator-xcode-clang"
+        experiment_percentage: 10
+      }
       builders { name: "linux-chromeos-rel" }
       builders { name: "linux-ozone-rel" }
       builders { name: "linux_chromium_compile_dbg_ng" }
@@ -88,21 +103,6 @@ verifiers {
     }
     buckets {
       name: "master.tryserver.chromium.mac"
-      # https://crbug.com/739556; make this non-experimental ASAP.
-      builders {
-        name: "ios-device"
-        experiment_percentage: 10
-      }
-      # https://crbug.com/739556
-      builders {
-        name: "ios-device-xcode-clang"
-        experiment_percentage: 10
-      }
-      # https://crbug.com/739556
-      builders {
-        name: "ios-simulator-xcode-clang"
-        experiment_percentage: 10
-      }
     }
     buckets {
       name: "master.tryserver.chromium.win"

ios/PRESUBMIT.py

@@ -97,7 +97,7 @@ def PostUploadHook(cl, change, output_api):
   # TODO(crbug.com/782735): Remove ios-simulator-full-configs once EarlGrey
   # bots are deployed on CQ.
   try_bots = ['master.tryserver.chromium.mac:ios-simulator-cronet',
-              'master.tryserver.chromium.mac:ios-simulator-full-configs']
+              'luci.chromium.try:ios-simulator-full-configs']
 
   return output_api.EnsureCQIncludeTrybotsAreAdded(
     cl, try_bots, 'Automatically added Cronet and EarlGrey trybots to '