Cleanup: Remove unneeded browser_thread.h includes.

chrome/browser/extensions/activity_log/activity_actions.cc

 // Copyright (c) 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_actions.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/format_macros.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/extensions/activity_log/activity_action_constants.h"
 #include "chrome/browser/extensions/activity_log/fullstream_ui_policy.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/dom_action_types.h"
-#include "content/public/browser/browser_thread.h"
 #include "content/public/browser/web_contents.h"
 #include "sql/statement.h"
 
 namespace constants = activity_log_constants;
 
 namespace {
 
 std::string Serialize(const base::Value* value) {
   std::string value_as_text;
   if (!value) {
@@ skipping 320 matching lines @@
     std::string rhs_other = ActivityLogPolicy::Util::Serialize(rhs->other());
     if (lhs_other != rhs_other)
       return lhs_other < rhs_other;
   }
 
   // All fields compare as equal if this point is reached.
   return false;
 }
 
 }  // namespace extensions