Get rid of the following dependencies from content:

content/browser/zygote_host_linux.cc

 // Copyright (c) 2011 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 "content/browser/zygote_host_linux.h"
 
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/eintr_wrapper.h"
 #include "base/environment.h"
 #include "base/linux_util.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/pickle.h"
 #include "base/process_util.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
-#include "chrome/common/chrome_constants.h"
 #include "content/browser/content_browser_client.h"
 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
 #include "content/common/content_switches.h"
 #include "content/common/process_watcher.h"
 #include "content/common/result_codes.h"
 #include "content/common/unix_domain_socket_posix.h"
 #include "sandbox/linux/suid/suid_unsafe_environment_variables.h"
 
 static void SaveSUIDUnsafeEnvironmentVariables() {
   // The ELF loader will clear many environment variables so we save them to
@@ skipping 327 matching lines @@
       !read_pickle.ReadInt(&iter, &tmp_exit_code)) {
     LOG(WARNING) << "Error parsing GetTerminationStatus response from zygote.";
     return base::TERMINATION_STATUS_NORMAL_TERMINATION;
   }
 
   if (exit_code)
     *exit_code = tmp_exit_code;
 
   return static_cast<base::TerminationStatus>(status);
 }