Remove some no-longer-used #includes from ChromeOS policy browser tests.

Bug: 844016
Change-Id: Ida401d3f0dd2b6aa6f82219f4cf3c0ca417762c5
Reviewed-on: https://chromium-review.googlesource.com/1075725Reviewed-by: Bartosz Fabianowski <bartfab@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562590}

chrome/browser/chromeos/policy/device_system_use_24hour_clock_browsertest.cc

@@ -24,7 +24,6 @@
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chromeos/chromeos_switches.h"
 #include "components/policy/proto/chrome_device_policy.pb.h"
-#include "content/public/test/test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace em = enterprise_management;

chrome/browser/chromeos/policy/display_rotation_default_handler_browsertest.cc

@@ -30,7 +30,6 @@
 #include "chromeos/dbus/session_manager_client.h"
 #include "chromeos/settings/cros_settings_names.h"
 #include "components/policy/proto/chrome_device_policy.pb.h"
-#include "content/public/test/test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/display/display.h"
 #include "ui/display/display_layout.h"

chrome/browser/chromeos/policy/unaffiliated_arc_allowed_browsertest.cc

@@ -22,7 +22,6 @@
 #include "chromeos/settings/cros_settings_names.h"
 #include "components/arc/arc_util.h"
 #include "components/policy/proto/chrome_device_policy.pb.h"
-#include "content/public/test/test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace em = enterprise_management;

chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos_browsertest.cc

@@ -7,7 +7,6 @@
 #include <utility>
 
 #include "base/macros.h"
-#include "base/run_loop.h"
 #include "base/test/scoped_feature_list.h"
 #include "base/values.h"
 #include "chrome/browser/chrome_notification_types.h"