Remove the old network implementation (see issue #2622)

The `--disable-features=NetworkService` flag is no longer supported.

patch/patch.cfg

@@ -128,12 +128,6 @@ patches = [
     # https://codereview.chromium.org/208313009
     'name': 'ui_dragdrop_355390',
   },
-  {
-    # Make URLRequest::set_is_pending() public so that it can be called from
-    # CefRequestInterceptor::MaybeInterceptResponse().
-    # https://bitbucket.org/chromiumembedded/cef/issues/1327
-    'name': 'net_urlrequest_1327',
-  },
   {
     # Remove NOTREACHED() that is hit when loading Flash in incognito mode.
     # https://bitbucket.org/chromiumembedded/cef/issue/1586
@@ -170,11 +164,6 @@ patches = [
     'name': 'pdfium_print_549365',
     'path': 'third_party/pdfium/',
   },
-  {
-    # Enable support for filtering resource responses.
-    # https://bitbucket.org/chromiumembedded/cef/issues/515
-    'name': 'net_filter_515',
-  },
   {
     # Modify views::View to extend SupportsUserData.
     # https://bitbucket.org/chromiumembedded/cef/issues/1749
@@ -222,11 +211,6 @@ patches = [
     'name': 'chrome_browser_profiles',
   },
   {
-    # Support direct access to NetExportFileWriter via BrowserProcess instead
-    # of adding a dependency on SystemNetworkContextManager (see
-    # https://crrev.com/6ed14d99e9).
-    # TODO(cef): Consider removing this once we support NetworkService.
-    #
     # Show the CEF Save As dialog.
     # https://bitbucket.org/chromiumembedded/cef/issues/2613
     'name': 'chrome_browser_net_export',
@@ -257,11 +241,6 @@ patches = [
     # https://bitbucket.org/chromiumembedded/cef/issues/2037
     'name': 'webui_2037',
   },
-  {
-    # Support an option to enable/disable net security expiration.
-    # https://bitbucket.org/chromiumembedded/cef/issues/1994
-    'name': 'net_security_expiration_1994',
-  },
   {
     # Implement breakpad/crashpad customization required by CEF.
     # https://bitbucket.org/chromiumembedded/cef/issues/1995