Chrome Version: 55.0.2883.35
Chrome OS Version: 8872.35.0
Chrome OS Platform: elm

From feedback report:
https://feedback.corp.google.com/product/208/neutron?lView=rd&lReport=15828032849
"Elm is acting *very* slow right now.  (This dialog took 7 seconds to come up)"

Feedback report filed ~2016-11-11 15:50:25.000.

Unfortunately, most of the logs are missing from this feedback report (including the kernel logs).
Logs are also missing from a follow-up feedback report:  https://feedback.corp.google.com/#/Report/15831952729

The only interesting log entries prior from /var/log/ui/ui.log are:
[Excluding "RequestProcessList not available" messages every second, which are tracked in  issue 654038 ]

2016-11-11 15:47:09.000 3 1237:1237: message_service.cc(469): Failed to create native process. [See issue 664877#c1]
...
2016-11-11 15:49:54.000 3 1237:1590: upload_data_presenter.cc(77): Not implemented reached in virtual void extensions<IPv6: 1>RawDataPresenter<IPv6: 9>Next(const net<IPv6: 1>UploadElementReader&)
2016-11-11 15:49:55.000 3 1237:1590: upload_data_presenter.cc(77): Not implemented reached in virtual void extensions<IPv6: 1>RawDataPresenter<IPv6: 9>Next(const net<IPv6: 1>UploadElementReader&)
2016-11-11 15:49:55.000 3 1237:1590: upload_data_presenter.cc(77): Not implemented reached in virtual void extensions<IPv6: 1>RawDataPresenter<IPv6: 9>Next(const net<IPv6: 1>UploadElementReader&)
...
2016-11-11 15:50:12.000 4 1237:1584: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 11> error:-4
2016-11-11 15:50:12.000 4 1237:1584: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 12> error:-4
2016-11-11 15:50:12.000 4 1237:1584: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 13> error:-4
2016-11-11 15:50:12.000 4 1237:1584: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 14> error:-4
2016-11-11 15:50:12.000 4 1237:1638: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 15> error:-4
2016-11-11 15:50:12.000 4 1237:1584: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 16> error:-4
2016-11-11 15:50:12.000 4 1237:1638: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 17> error:-4
2016-11-11 15:50:12.000 4 1237:1584: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 61> error:-4
2016-11-11 15:50:12.000 4 1237:1584: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 62> error:-4
2016-11-11 15:50:12.000 4 1237:1638: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 22> error:-4
2016-11-11 15:50:12.000 4 1237:1638: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 23> error:-4
2016-11-11 15:50:12.000 4 1237:1584: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 18> error:-4
2016-11-11 15:50:12.000 4 1237:1638: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 19> error:-4
2016-11-11 15:50:12.000 4 1237:1584: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 24> error:-4
2016-11-11 15:50:12.000 4 1237:1638: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 25> error:-4
2016-11-11 15:50:12.000 4 1237:1584: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 20> error:-4
2016-11-11 15:50:12.000 4 1237:1584: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 21> error:-4
2016-11-11 15:50:12.000 4 1237:1638: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 26> error:-4
2016-11-11 15:50:12.000 4 1237:1638: obfuscated_file_util.cc(1181): Failed to get origin+type directory: filesystem:<URL: 27> error:-4