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

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 ca0ab239d759b9ade876a4d8614e4280566a6050..afca23a228ab2bb02fe5eda2a27b158033ff1c16 100644
--- a/testing/buildbot/chromium.win.json
+++ b/testing/buildbot/chromium.win.json
@@ -130,6 +130,12 @@
         "test": "media_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "midi_unittests"
+      },
+      {
         "test": "mojo_common_unittests"
       },
       {
@@ -371,6 +377,12 @@
         "test": "message_center_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "midi_unittests"
+      },
+      {
         "test": "mojo_common_unittests"
       },
       {
@@ -749,6 +761,12 @@
         "test": "message_center_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "midi_unittests"
+      },
+      {
         "test": "mojo_common_unittests"
       },
       {
@@ -977,6 +995,12 @@
         "test": "media_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "midi_unittests"
+      },
+      {
         "test": "mojo_common_unittests"
       },
       {
@@ -1362,6 +1386,12 @@
         "test": "media_unittests"
       },
       {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
+        "test": "midi_unittests"
+      },
+      {
         "test": "nacl_loader_unittests"
       },
       {