Convert google_apis_unittests to run exclusively on Swarming

testing/buildbot/chromium.win.json

Index: testing/buildbot/chromium.win.json
diff --git a/testing/buildbot/chromium.win.json b/testing/buildbot/chromium.win.json
index 6a206c6349c8a36541581dc138c9e3fdf4245ad4..0f47b66b85894f9cfc3680b0ebdf8d5579d419d3 100644
--- a/testing/buildbot/chromium.win.json
+++ b/testing/buildbot/chromium.win.json
@@ -129,6 +129,9 @@
         "test": "gl_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "google_apis_unittests"
       },
       {
@@ -466,6 +469,9 @@
         "test": "gl_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "google_apis_unittests"
       },
       {
@@ -935,6 +941,9 @@
         "test": "gl_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "google_apis_unittests"
       },
       {
@@ -1770,6 +1779,9 @@
         "test": "gl_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "google_apis_unittests"
       },
       {