Add logging to debug DumpAccessibilityEvent* tests WinClang*

testing/buildbot/chromium.fyi.json

Index: testing/buildbot/chromium.fyi.json
diff --git a/testing/buildbot/chromium.fyi.json b/testing/buildbot/chromium.fyi.json
index 530c87432d05e840535f9d07c161cd981b0cbc92..480c095fd6a2d870ec0bbb736c890afb75007de8 100644
--- a/testing/buildbot/chromium.fyi.json
+++ b/testing/buildbot/chromium.fyi.json
@@ -401,7 +401,7 @@
       {
         "test": "content_browsertests",
         "swarming": {
-          "can_use_on_swarming_builders": true
+          "can_use_on_swarming_builders": false
         }
       },

[Nico, 2015/01/29 02:16:53]

I would've replaced this whole block with just "content_browsertests". If Pawel
says that just toggling this to false does the same thing, this lgtm as is too.
(Or you could just check it in and we'd find out what happens – I'm kind of
curious :-) )

       "installer_util_unittests"
@@ -453,7 +453,7 @@
       {
         "test": "content_browsertests",
         "swarming": {
-          "can_use_on_swarming_builders": true
+          "can_use_on_swarming_builders": false
         }
       },
       "installer_util_unittests"