> 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
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/threading/thread_task_runner_handle.h"
#include "brightray/browser/net/devtools_network_conditions.h"
#include "brightray/browser/net/devtools_network_controller_handle.h"
#include "chrome/common/pref_names.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/storage_partition.h"
#include "native_mate/dictionary.h"
#include "native_mate/object_template_builder.h"
#include "net/base/load_flags.h"
#include "net/disk_cache/disk_cache.h"
#include "net/dns/host_cache.h"
#include "net/http/http_auth_handler_factory.h"
#include "net/http/http_auth_preferences.h"
#include "net/proxy/proxy_service.h"
#include "net/proxy/proxy_config_service_fixed.h"
#include "net/url_request/static_http_user_agent_settings.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_context_getter.h"
#include "ui/base/l10n/l10n_util.h"
using content::BrowserThread;
using content::StoragePartition;
namespace {
struct ClearStorageDataOptions {
  GURL origin;
  uint32_t storage_types = StoragePartition::REMOVE_DATA_MASK_ALL;
  uint32_t quota_types = StoragePartition::QUOTA_MANAGED_STORAGE_MASK_ALL;
};
uint32_t GetStorageMask(const std::vector<std::string>& storage_types) {