https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=chrome_public_test_apk&tests=org.chromium.chrome.browser.download.ui.DownloadHistoryAdapterTest%23testSearch_RemoveItem

There are a couple of logcat for the crash:
https://luci-logdog.appspot.com/v/?s=chromium%2Fandroid%2Fswarming%2Flogcats%2F3795caa1a001e011%2F%2B%2Flogcat_org.chromium.chrome.browser.download.ui.DownloadHistoryAdapterTest.testSearch_RemoveItem_20170726T034616-UTC_00490da18562cc57

https://chromium-swarm.appspot.com/task?id=3799049099303a10

https://chromium-swarm.appspot.com/task?id=3799bdb80eacec10


They all basically look like:

java.util.ConcurrentModificationException
	at java.util.ArrayList$ArrayListIterator.next(ArrayList.java:573)
	at org.chromium.chrome.browser.download.ui.BackendItems.getTotalBytes(BackendItems.java:33)
	at org.chromium.chrome.browser.download.ui.DownloadHistoryAdapter.getTotalDownloadSize(DownloadHistoryAdapter.java:305)
	at org.chromium.chrome.browser.download.ui.SpaceDisplay.update(SpaceDisplay.java:179)
	at org.chromium.chrome.browser.download.ui.SpaceDisplay.access$200(SpaceDisplay.java:32)
	at org.chromium.chrome.browser.download.ui.SpaceDisplay$1.onPostExecute(SpaceDisplay.java:151)
	at org.chromium.chrome.browser.download.ui.SpaceDisplay$1.onPostExecute(SpaceDisplay.java:146)
	at android.os.AsyncTask.finish(AsyncTask.java:651)
	at android.os.AsyncTask.-wrap1(AsyncTask.java)
	at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:668)
	at android.os.Handler.dispatchMessage(Handler.java:102)
	at android.os.Looper.loop(Looper.java:148)
	at android.app.ActivityThread.main(ActivityThread.java:5417)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)