Reland: Web MIDI: split build rules for media/midi

testing/buildbot/chromium.linux.json

Index: testing/buildbot/chromium.linux.json
diff --git a/testing/buildbot/chromium.linux.json b/testing/buildbot/chromium.linux.json
index e3819f52dc0b624fe4ea8935cfabcb264e538856..4403e00ee4b77e833764e3d5bf0415af3315217b 100644
--- a/testing/buildbot/chromium.linux.json
+++ b/testing/buildbot/chromium.linux.json
@@ -277,6 +277,12 @@
         "test": "media_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "midi_unittests"
+      },
+      {
         "test": "mojo_common_unittests"
       },
       {
@@ -531,6 +537,12 @@
         "test": "media_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "midi_unittests"
+      },
+      {
         "test": "mojo_common_unittests"
       },
       {
@@ -775,6 +787,12 @@
         "test": "media_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "midi_unittests"
+      },
+      {
         "test": "mojo_common_unittests"
       },
       {