[Extensions][TaskScheduler] Update ActivityLog for scheduling migration

chrome/browser/extensions/activity_log/activity_log_policy.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/activity_log/activity_log_policy.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
 
 #include "base/files/file_path.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/time/clock.h"
 #include "base/time/time.h"
 #include "chrome/browser/extensions/activity_log/activity_action_constants.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/common/extension.h"
 #include "url/gurl.h"
 
-using content::BrowserThread;
-
 namespace constants = activity_log_constants;
 
 namespace extensions {
 
 ActivityLogPolicy::ActivityLogPolicy(Profile* profile) {}
 
 ActivityLogPolicy::~ActivityLogPolicy() {}
 
 void ActivityLogPolicy::SetClockForTesting(std::unique_ptr<base::Clock> clock) {
   testing_clock_ = std::move(clock);
@@ skipping 112 matching lines @@
     *late_bound = base::Time::Max().ToInternalValue();
   } else {
     base::Time early_time = Util::AddDays(morning_midnight, -days_ago);
     base::Time late_time = Util::AddDays(early_time, 1);
     *early_bound = early_time.ToInternalValue();
     *late_bound = late_time.ToInternalValue();
   }
 }
 
 }  // namespace extensions