Update the build rule for media router tests (e2e) and the mapping.

testing/buildbot/gn_isolate_map.pyl

Index: testing/buildbot/gn_isolate_map.pyl
diff --git a/testing/buildbot/gn_isolate_map.pyl b/testing/buildbot/gn_isolate_map.pyl
index 46adb4c89becb9182e671e8daaec0f23c546eff6..cf16dc54acafe9ee4af34e345c9f1c85ab1e83f2 100644
--- a/testing/buildbot/gn_isolate_map.pyl
+++ b/testing/buildbot/gn_isolate_map.pyl
@@ -558,6 +558,13 @@
     "label": "//media/blink:media_blink_unittests",
     "type": "windowed_test_launcher",
   },
+  "media_router_tests": {
+    "label": "//chrome/test/media_router:media_router_tests",
+    "type": "script",
+    "script": "//chrome/test/media_router/internal/media_router_tests.py",
+    "args": ["--extension", "mr_extension/",

[M-A Ruel, 2016/11/28 21:32:16]

Please make the formatting like the others "script" entries, basically one flag
per line so the file itself stays internally consistent.

[cliffordcheng1, 2016/11/28 21:47:46]

Done.

+             "--test_binary", "./browser_tests"],
+  },
   "midi_unittests": {
     "label": "//media/midi:midi_unittests",
     "type": "windowed_test_launcher",