> proxyRules = schemeProxies[";"<schemeProxies>]
> schemeProxies = [<urlScheme>"="]<proxyURIList>
> urlScheme = "http" | "https" | "ftp" | "socks"
> proxyURIList = <proxyURL>[","<proxyURIList>]
> proxyURL = [<proxyScheme>"://"]<proxyHost>[":"<proxyPort>]

atom/browser/api/atom_api_session.cc
ClearStorageDataOptions options;
  base::Closure callback;
  args->GetNext(&options);
  args->GetNext(&callback);
  auto storage_partition =
      content::BrowserContext::GetStoragePartition(browser_context(), nullptr);
  storage_partition->ClearData(
      options.storage_types, options.quota_types, options.origin,
      content::StoragePartition::OriginMatcherFunction(),
      base::Time(), base::Time::Max(),
      base::Bind(&OnClearStorageDataDone, callback));
}
void Session::FlushStorageData() {
  auto storage_partition =
      content::BrowserContext::GetStoragePartition(browser_context(), nullptr);
  storage_partition->Flush();
}
void Session::SetProxy(const net::ProxyConfig& config,
                       const base::Closure& callback) {
  auto getter = browser_context_->GetRequestContext();
  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
      base::Bind(&SetProxyInIO, base::Unretained(getter), config, callback));
}
void Session::SetDownloadPath(const base::FilePath& path) {