Extract media/capture/capture_unittests from media_unittests

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 88c02493154096d4aa9bffb6f20019cdbd3374b5..a68563b9a29e4873be90a0bdd624643ad954de0f 100644
--- a/testing/buildbot/chromium.win.json
+++ b/testing/buildbot/chromium.win.json
@@ -66,6 +66,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "capture_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "cast_unittests"
       },
       {
@@ -566,6 +572,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "capture_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "cast_unittests"
       },
       {
@@ -1005,6 +1017,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "capture_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "cast_unittests"
       },
       {
@@ -1471,6 +1489,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "capture_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "cast_unittests"
       },
       {