Move navigations with POST or referrer to the shell.

mojo/services/network/network_context.h

Index: mojo/services/network/network_context.h
diff --git a/mojo/services/network/network_context.h b/mojo/services/network/network_context.h
index 19e8e5ab42bf9856dafad15a6def5841ffc116e2..96e8d684457efeee1fd1f181f9515477bb0639b9 100644
--- a/mojo/services/network/network_context.h
+++ b/mojo/services/network/network_context.h
@@ -45,6 +45,9 @@ class NetworkContext {
   static scoped_ptr<net::URLRequestContext> MakeURLRequestContext(
       const base::FilePath& base_path);
 
+  class MojoNetLog;
+  scoped_ptr<class MojoNetLog> net_log_;
+
   scoped_ptr<net::URLRequestContext> url_request_context_;
   // URLLoaderImpls register themselves with the NetworkContext so that they can
   // be cleaned up when the NetworkContext goes away. This is needed as