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For a 1% experiment with simplified domain display, we should exclude
enterprise enrolled devices to not disrupt enterprise environments when
collecting data.
This CL includes the following settings to achieve that purpose:
- Added a IsEnterpriseManaged() virtual method to OmniboxViewViews, in order to
filter whether a device is enterprise enrolled or not
- Added |is_enterprise_managed_for_testing| variable to toggle during
testing. It is by default FALSE, so, it should not affect previous
tests
- Added a SetEnterpriseManagedForTesting() method in TestOmniboxView to manually toggle the
|is_enterprise_managed_for_testing| flag, which is used in an overrode version of IsEnterpriseManaged()
- Add an special test to validate that URL is not unelided even when
field trials are enabled but the device is enterprise managed

Bug: 1109243
Change-Id: I79b47374de6c9eb780b5e56bef6408d3130c4168
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2348578
Commit-Queue: Ernesto García <ernestognw@google.com>
Reviewed-by: Carlos IL <carlosil@chromium.org>
Reviewed-by: Tommy Li <tommycli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797930}