Move mini_installer_tests to Win10 as experiment.

This moves the new isolated-script-based installer test to run on
Win10 as an experiment, rather than running locally on Win Fast
Ring (also fixing the gtest misconfiguration).

No-Try: true
Bug: 827546

Change-Id: I687a763d81c7095c88a6c879156ff2043336a863
Reviewed-on: https://chromium-review.googlesource.com/988260Reviewed-by: Stephen Martinis <martiniss@chromium.org>
Commit-Queue: Dirk Pranke <dpranke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#547843}

testing/buildbot/chromium.fyi.json

@@ -8547,12 +8547,6 @@
         },
         "test": "midi_unittests"
       },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": false
-        },
-        "test": "mini_installer_tests"
-      },
       {
         "swarming": {
           "can_use_on_swarming_builders": false

testing/buildbot/chromium.win.json

@@ -1126,6 +1126,16 @@
         },
         "test": "wtf_unittests"
       }
+    ],
+    "isolated_scripts": [
+      {
+        "experiment_percentage": 10,
+        "isolate_name": "mini_installer_tests",
+        "name": "mini_installer_tests",
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        }
+      }
     ]
   },
   "Win10 Tests x64 (dbg)": {

testing/buildbot/test_suites.pyl

@@ -1296,10 +1296,6 @@
     'sandbox_mac_unittests': {},
   },
 
-  'mini_installer_tests_isolated_tests': {
-    'mini_installer_tests': {},
-  },
-
   'mojo_chromiumos_specific_gtests': {
     'wayland_client_perftests': {},
   },
@@ -1816,6 +1812,12 @@
     'zucchini_unittests': {},
   },
 
+  'win_specific_isolated_scripts': {
+    'mini_installer_tests': {
+      'experiment_percentage': 10,
+    },
+  },
+
   'win7_32_bit_gtests': {
     'base_unittests': {},
     'battor_agent_unittests': {},
@@ -2238,7 +2240,6 @@
     'chromium_gtests',
     'chromium_gtests_for_devices_with_graphical_output',
     'interactive_ui_tests_gtests',
-    'mini_installer_tests_isolated_tests',
     'non_android_chromium_gtests',
     'non_android_and_cast_chromium_gtests',
     'non_android_and_cast_and_chromeos_chromium_gtests',

testing/buildbot/waterfalls.pyl

@@ -2071,6 +2071,7 @@
       'Win10 Tests x64': {
         'test_suites': {
           'gtest_tests': 'chromium_win_gtests',
+          'isolated_scripts': 'win_specific_isolated_scripts',
         },
       },
       'Win7 (32) Tests': {