Add a copy or move validator to that can handle support audio and video files.

chrome/browser_tests.isolate

Index: chrome/browser_tests.isolate
diff --git a/chrome/browser_tests.isolate b/chrome/browser_tests.isolate
index 9c9ad0976b929788c046674c3ae2261b399403f8..79ffdc0c02bc836f0b5cee54312a63b043d23e94 100644
--- a/chrome/browser_tests.isolate
+++ b/chrome/browser_tests.isolate
@@ -39,6 +39,9 @@
     ['OS=="linux" or OS=="mac" or OS=="win"', {
       'variables': {
         'isolate_dependency_tracked': [
+          '../media/test/data/bear-320x240-multitrack.webm',
+          '../media/test/data/no_streams.webm',
+          '../media/test/data/sfx.ogg',
           '../ppapi/tests/test_case.html',
           '../ppapi/tests/test_page.css',
           '../tools/swarm_client/run_isolated.py',