Follow-on fixes and naming changes for https://codereview.chromium.org/12086077/

BUG=172573
Review URL: https://codereview.chromium.org/12177018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@180600 0039d316-1c4b-4281-b951-d872f2087c98
ChromePluginServiceFilter::GetProcess(
    int render_process_id) const {
  std::map<int, ProcessDetails>::const_iterator it =
      plugin_details_.find(render_process_id);
  if (it == plugin_details_.end())
    return NULL;
  return &it->second;
}

ChromePluginServiceFilter::GetProcess(
    int render_process_id) const {
  std::map<int, ProcessDetails>::const_iterator it =
      plugin_details_.find(render_process_id);
  if (it == plugin_details_.end())
    return NULL;
  return &it->second;
}
