Add GN win x64 bots to buildbot/testing/chromium.win.json.

This makes the new trybots actually build the same targets
as the waterfall bots, rather than 'all' (which doesn't
work at the moment).

TBR=phajdan.jr@chromium.org
BUG=477879

Review URL: https://codereview.chromium.org/1078983006

Cr-Commit-Position: refs/heads/master@{#326979}

testing/buildbot/tryserver.chromium.win.json

@@ -122,5 +122,129 @@
         "test": "base_unittests"
       }
     ]
+  },
+  "win_chromium_gn_x64_dbg": {
+    "additional_compile_targets": [
+      "accessibility_unittests",
+      "app_list_unittests",
+      "app_shell_unittests",
+      "ash_unittests",
+      "aura_unittests",
+      "cacheinvalidation_unittests",
+      "cast_unittests",
+      "cc_unittests",
+      "chrome",
+      "chrome_elf_unittests",
+      "chromedriver_unittests",
+      "components_browsertests",
+      "components_unittests",
+      "compositor_unittests",
+      "content_browsertests",
+      "content_unittests",
+      "courgette_unittests",
+      "crypto_unittests",
+      "device_unittests",
+      "events_unittests",
+      "extensions_browsertests",
+      "extensions_unittests",
+      "gcm_unit_tests",
+      "gfx_unittests",
+      "google_apis_unittests",
+      "gpu_unittests",
+      "interactive_ui_tests",
+      "ipc_mojo_unittests",
+      "ipc_tests",
+      "jingle_unittests",
+      "keyboard_unittests",
+      "media_unittests",
+      "message_center_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",
+      "sbox_integration_tests",
+      "sbox_unittests",
+      "sbox_validation_tests",
+      "skia_unittests",
+      "sql_unittests",
+      "sync_integration_tests",
+      "sync_unit_tests",
+      "ui_base_unittests",
+      "ui_touch_selection_unittests",
+      "url_unittests",
+      "views_unittests",
+      "wm_unittests"
+    ],
+    "gtest_tests": [
+      {
+        "test": "base_unittests"
+      }
+    ]
+  },
+  "win_chromium_gn_x64_rel": {
+    "additional_compile_targets": [
+      "accessibility_unittests",
+      "app_list_unittests",
+      "app_shell_unittests",
+      "ash_unittests",
+      "aura_unittests",
+      "cacheinvalidation_unittests",
+      "cast_unittests",
+      "cc_unittests",
+      "chrome",
+      "chrome_elf_unittests",
+      "chromedriver_unittests",
+      "components_browsertests",
+      "components_unittests",
+      "compositor_unittests",
+      "content_browsertests",
+      "content_unittests",
+      "courgette_unittests",
+      "crypto_unittests",
+      "device_unittests",
+      "events_unittests",
+      "extensions_browsertests",
+      "extensions_unittests",
+      "gcm_unit_tests",
+      "gfx_unittests",
+      "google_apis_unittests",
+      "gpu_unittests",
+      "interactive_ui_tests",
+      "ipc_mojo_unittests",
+      "ipc_tests",
+      "jingle_unittests",
+      "keyboard_unittests",
+      "media_unittests",
+      "message_center_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",
+      "sbox_integration_tests",
+      "sbox_unittests",
+      "sbox_validation_tests",
+      "skia_unittests",
+      "sql_unittests",
+      "sync_integration_tests",
+      "sync_unit_tests",
+      "ui_base_unittests",
+      "ui_touch_selection_unittests",
+      "url_unittests",
+      "views_unittests",
+      "wm_unittests"
+    ],
+    "gtest_tests": [
+      {
+        "test": "base_unittests"
+      }
+    ]
   }
 }