Convert Mojo tests to use swarming.

testing/buildbot/chromium.memory.fyi.json

Index: testing/buildbot/chromium.memory.fyi.json
diff --git a/testing/buildbot/chromium.memory.fyi.json b/testing/buildbot/chromium.memory.fyi.json
index 91bd8279a3ec3bca38bc7632656619f409a0316a..2dfbd4abcd630687e3448dc3d52f81105d8c4e3b 100644
--- a/testing/buildbot/chromium.memory.fyi.json
+++ b/testing/buildbot/chromium.memory.fyi.json
@@ -496,6 +496,9 @@
         "test": "interactive_ui_tests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "ipc_mojo_unittests"
       },
       {
@@ -547,6 +550,9 @@
         "test": "mojo_public_system_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "mojo_system_unittests"
       },
       {
@@ -792,6 +798,9 @@
         "test": "interactive_ui_tests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "ipc_mojo_unittests"
       },
       {
@@ -843,6 +852,9 @@
         "test": "mojo_public_system_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "mojo_system_unittests"
       },
       {
@@ -1069,6 +1081,9 @@
         "test": "gpu_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "ipc_mojo_unittests"
       },
       {