Display active audio streams on chrome://media-internals.

chrome/browser/resources/media_internals/media_internals.css

Index: chrome/browser/resources/media_internals/media_internals.css
diff --git a/chrome/browser/resources/media_internals/media_internals.css b/chrome/browser/resources/media_internals/media_internals.css
new file mode 100644
index 0000000000000000000000000000000000000000..7198d9bd4ded2e14b53cef5b4b699fa405d38d21
--- /dev/null
+++ b/chrome/browser/resources/media_internals/media_internals.css
@@ -0,0 +1,16 @@
+/* Copyright (c) 2011 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+.audio-stream[status='created'] {
+  color: blue;
+}
+
+.audio-stream[status='closed'] {
+  text-decoration: line-through;
+}
+
+.audio-stream[status='error'] {
+  color: red;
+}