Update lists of compile targets for the GN bots.

testing/buildbot/chromium.mac.json

Index: testing/buildbot/chromium.mac.json
diff --git a/testing/buildbot/chromium.mac.json b/testing/buildbot/chromium.mac.json
index 2907a386d856b9c9b3b77b102834a2abae8f4102..8883601c4890328c729211a6112a61875a3d1fa0 100644
--- a/testing/buildbot/chromium.mac.json
+++ b/testing/buildbot/chromium.mac.json
@@ -1,7 +1,32 @@
 {
   "Mac GN": {
     "additional_compile_targets": [
-      "all"
+      "accessibility_unittests",
+      "base_unittests",
+      "cacheinvalidation_unittests",
+      "cast_unittests",
+      "cc_unittests",
+      "chromedriver_unittests",
+      "crypto_unittests",
+      "gcm_unit_tests",
+      "gn_unittests",
+      "gpu_unittests",
+      "ipc_tests",
+      "jingle_unittests",
+      "media_unittests",
+      "mojo_common_unittests",
+      "mojo_public_bindings_unittests",
+      "mojo_public_environment_unittests",
+      "mojo_public_system_unittests",
+      "mojo_public_utility_unittests",
+      "mojo_system_unittests",
+      "ppapi_unittests",
+      "printing_unittests",
+      "skia_unittests",
+      "sql_unittests",
+      "sync_unit_tests",
+      "ui_base_unittests",
+      "url_unittests"
     ],
     "gtest_tests": [
       {
@@ -11,7 +36,32 @@
   },
   "Mac GN (dbg)": {
     "additional_compile_targets": [
-      "all"
+      "accessibility_unittests",
+      "base_unittests",
+      "cacheinvalidation_unittests",
+      "cast_unittests",
+      "cc_unittests",
+      "chromedriver_unittests",
+      "crypto_unittests",
+      "gcm_unit_tests",
+      "gn_unittests",
+      "gpu_unittests",
+      "ipc_tests",
+      "jingle_unittests",
+      "media_unittests",
+      "mojo_common_unittests",
+      "mojo_public_bindings_unittests",
+      "mojo_public_environment_unittests",
+      "mojo_public_system_unittests",
+      "mojo_public_utility_unittests",
+      "mojo_system_unittests",
+      "ppapi_unittests",
+      "printing_unittests",
+      "skia_unittests",
+      "sql_unittests",
+      "sync_unit_tests",
+      "ui_base_unittests",
+      "url_unittests"
     ],
     "gtest_tests": [
       {