[cr-buildbucket.cfg] Add experimental bots on win and mac to test patching on gclient

This adds {win,mac}_chromium_compile_dbg_ng_patch_on_gclient to make sure that
patching on gclient works as expected.

Bug: 643346
Change-Id: Ife7cb26c1b699be50d85f5e629824e7f205781cd
Reviewed-on: https://chromium-review.googlesource.com/1043345Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556165}

infra/config/branch/cq.cfg

@@ -42,8 +42,16 @@ verifiers {
       builders { name: "linux_chromium_rel_ng" }
       builders { name: "linux_chromium_tsan_rel_ng" }
       builders { name: "mac_chromium_compile_dbg_ng" }
+      builders {
+        name: "mac_chromium_compile_dbg_ng_patch_on_gclient"
+        experiment_percentage: 5
+      }
       builders { name: "mac_chromium_rel_ng" }
       builders { name: "win_chromium_compile_dbg_ng" }
+      builders {
+        name: "win_chromium_compile_dbg_ng_patch_on_gclient"
+        experiment_percentage: 5
+      }
     }
     buckets {
       name: "master.tryserver.chromium.android"

infra/config/global/cr-buildbucket.cfg

@@ -1406,6 +1406,18 @@ buckets {
     builders { mixins: "mac-try" name: "mac_chromium_asan_rel_ng" }
     builders { mixins: "mac-try" name: "mac_chromium_asan_variable" }
     builders { mixins: "mac-try" name: "mac_chromium_compile_dbg_ng" dimensions:"os:Mac-10.13.3"}
+    builders {
+      mixins: "mac-try"
+      name: "mac_chromium_compile_dbg_ng_patch_on_gclient"
+      dimensions: "builder:mac_chromium_compile_dbg_ng"
+      dimensions: "os:Mac-10.13.3"
+      experimental: YES
+      auto_builder_dimension: NO
+      recipe {
+        properties: "buildername:mac_chromium_compile_dbg_ng"
+        properties_j: "$depot_tools/bot_update:{\"apply_patch_on_gclient\":true}"
+      }
+    }
     builders { mixins: "mac-try" name: "mac_chromium_compile_rel_ng" }
     builders { mixins: "mac-try" name: "mac_chromium_dbg_ng" dimensions:"os:Mac-10.12"}
     builders { mixins: "mac-try" name: "mac_chromium_gn_upload" }
@@ -1448,6 +1460,17 @@ buckets {
     builders { mixins: "win-try" name: "win_archive" }
     builders { mixins: "win-try" name: "win_chrome_official" }
     builders { mixins: "win-try" name: "win_chromium_compile_dbg_ng" }
+    builders {
+      mixins: "win-try"
+      name: "win_chromium_compile_dbg_ng_patch_on_gclient"
+      dimensions: "builder:win_chromium_compile_dbg_ng"
+      experimental: YES
+      auto_builder_dimension: NO
+      recipe {
+        properties: "buildername:win_chromium_compile_dbg_ng"
+        properties_j: "$depot_tools/bot_update:{\"apply_patch_on_gclient\":true}"
+      }
+    }
     builders { mixins: "win-try" name: "win_chromium_compile_rel_ng" }
     # TODO(crbug/794085): Revisit exceptional extra-long timeout when we speed
     # up the builder.