The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e0de461daf57c3283d84ad99fd92a0cf7ec26226

commit e0de461daf57c3283d84ad99fd92a0cf7ec26226
Author: Sasha Morrissey <sashab@chromium.org>
Date: Thu May 24 00:38:34 2018

Add .gdoc, .gsheets, .gslides to FileBrowser.ViewingFileType UMA

the console should show the recorded metrics correctly.

Test: Set metrics.log = true and try and open one of each file type;
Bug:  846136 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I95bc7439f79a2f8c616a4ca655938b956b5bfd59
Reviewed-on: https://chromium-review.googlesource.com/1070907
Reviewed-by: Stuart Langley <slangley@chromium.org>
Commit-Queue: Sasha Morrissey <sashab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#561337}
[modify] https://crrev.com/e0de461daf57c3283d84ad99fd92a0cf7ec26226/tools/metrics/histograms/enums.xml
[modify] https://crrev.com/e0de461daf57c3283d84ad99fd92a0cf7ec26226/ui/file_manager/file_manager/foreground/js/file_tasks.js