Add mb config and test spec for CrOS vm tester bot.

https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/chromeos-amd64-generic-rel-vm-tests

https://chromium-review.googlesource.com/c/chromium/tools/build/+/1013289 needs
to land before the tests actually do anything. Hopefully I'll be able to land
that sometime soon. This at least gets the configs set up.

Bug: 832374
Change-Id: I93665b1307c82e84e5a5d83d2092a792786573f6
Reviewed-on: https://chromium-review.googlesource.com/1014484
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551216}

testing/buildbot/chromium.fyi.json

@@ -9088,6 +9088,49 @@
       "chromiumos_preflight"
     ]
   },
+  "chromeos-amd64-generic-rel-vm-tests": {
+    "additional_compile_targets": [
+      "chromiumos_preflight"
+    ],
+    "gtest_tests": [
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "kvm": "1",
+              "os": "Ubuntu-14.04"
+            }
+          ]
+        },
+        "test": "crypto_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "kvm": "1",
+              "os": "Ubuntu-14.04"
+            }
+          ]
+        },
+        "test": "sql_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "kvm": "1",
+              "os": "Ubuntu-14.04"
+            }
+          ]
+        },
+        "test": "url_unittests"
+      }
+    ]
+  },
   "linux-annotator-rel": {
     "scripts": [
       {

testing/buildbot/test_suites.pyl

@@ -348,6 +348,12 @@
     },
   },
 
+  'chromeos_gtests': {
+    'crypto_unittests': {},
+    'sql_unittests': {},
+    'url_unittests': {},
+  },
+
   'chromeos_remote_device_isolated_tests': {
     'telemetry_perf_unittests': {
       'args': [

testing/buildbot/waterfalls.pyl

@@ -1378,6 +1378,22 @@
           'chromiumos_preflight',
         ],
       },
+      'chromeos-amd64-generic-rel-vm-tests': {
+        'additional_compile_targets': [
+          'chromiumos_preflight',
+        ],
+        'test_suites': {
+          'gtest_tests': 'chromeos_gtests',
+        },
+        'swarming': {
+          'dimension_sets': [
+            {
+              'kvm': '1',
+              'os': 'Ubuntu-14.04',
+            },
+          ],
+        },
+      },
     },
   },
   {

tools/mb/mb_config.pyl

@@ -162,6 +162,7 @@
       'CFI Linux CF': 'cfi_full_cfi_icall_cfi_diag_recover_release_static',
       'CFI Linux ToT': 'clang_tot_cfi_full_cfi_icall_cfi_diag_thin_lto_release_static_dcheck_always_on',
       'CFI Linux (icall)': 'cfi_full_diag_icall_release_static_dcheck_always_on',
+      'chromeos-amd64-generic-rel': 'cros_chrome_sdk',
       'chromeos-amd64-generic-rel-goma-canary': 'cros_chrome_sdk',
 
       'Linux Builder Goma Canary': 'release_bot',