Split HttpNetworkSession::Params into two structs.

net/url_request/url_request_context.h

Index: net/url_request/url_request_context.h
diff --git a/net/url_request/url_request_context.h b/net/url_request/url_request_context.h
index 0d954a62df6b1f0bda625486f084222792b340f6..5874bbc157c4738cdaa197283cb058bc4026dfa6 100644
--- a/net/url_request/url_request_context.h
+++ b/net/url_request/url_request_context.h
@@ -73,6 +73,10 @@ class NET_EXPORT URLRequestContext
   // session.
   const HttpNetworkSession::Params* GetNetworkSessionParams() const;
 
+  // May return nullptr if this context doesn't have an associated network
+  // session.
+  const HttpNetworkSession::Context* GetNetworkSessionContext() const;
+
   // This function should not be used in Chromium, please use the version with
   // NetworkTrafficAnnotationTag in the future.
   std::unique_ptr<URLRequest> CreateRequest(