Remove support for GlobalNetworkClientFactory from RequestTracker.

ios/net/crn_http_protocol_handler.mm

Index: ios/net/crn_http_protocol_handler.mm
diff --git a/ios/net/crn_http_protocol_handler.mm b/ios/net/crn_http_protocol_handler.mm
index d2855b4e2aebe73594100d0c81cdb470557ab22d..c9101f32a091df6f641f13d0938cdbe30a496e0f 100644
--- a/ios/net/crn_http_protocol_handler.mm
+++ b/ios/net/crn_http_protocol_handler.mm
@@ -663,11 +663,6 @@ void HttpProtocolHandlerCore::Start(id<CRNNetworkClientProtocol> base_client) {
   if (tracker_) {
     // Set up any clients that can operate regardless of the request
     PushClients(tracker_->ClientsHandlingAnyRequest());
-  } else {
-    // There was no request_group_id, so the request was from something like a
-    // data: or file: URL.
-    // Attach any global clients to the request.
-    PushClients(RequestTracker::GlobalClientsHandlingAnyRequest());

[sdefresne, 2017/01/13 10:29:12]

This method was always returning an empty NSArray, so I just removed the call to
PushClients.

   }
 
   // Now that all of the network clients are set up, if there was an error with