Remove support for GlobalNetworkClientFactory from RequestTracker.

ios/net/request_tracker.h

Index: ios/net/request_tracker.h
diff --git a/ios/net/request_tracker.h b/ios/net/request_tracker.h
index 1260b15669e611fcf0850c984077a8a18cf86894..13c0d11ab32a523e2f27084a852caccb9fbc0ef2 100644
--- a/ios/net/request_tracker.h
+++ b/ios/net/request_tracker.h
@@ -79,14 +79,6 @@ class RequestTracker {
   // this tracker.
   void AddNetworkClientFactory(CRNForwardingNetworkClientFactory* factory);
 
-  // Registers a factory with the class that will be added to all trackers.
-  // Requests without associated trackers can add clients from these factories
-  // using GlobalClientsHandlingAnyRequest().
-  // Only |-clientHandlingAnyRequest| will be called on |factory|, the other
-  // methods are not supported.
-  static void AddGlobalNetworkClientFactory(
-      CRNForwardingNetworkClientFactory* factory);
-
   // Gets the request context associated with the tracker.
   virtual URLRequestContext* GetRequestContext() = 0;
 
@@ -96,10 +88,6 @@ class RequestTracker {
   // may be empty. The caller is responsible for taking ownership of the clients
   // in the array.
 
-  // Static method that returns clients that can handle any request, for use
-  // in cases where a request isn't associated with any request_tracker.
-  static NSArray* GlobalClientsHandlingAnyRequest();
-
   // Returns clients that can handle any request.
   NSArray* ClientsHandlingAnyRequest();
   // Returns clients that can handle |request|.