Clean up SpdySessionDependencies to remove code duplication.

net/spdy/spdy_test_util_spdy3.h

Index: net/spdy/spdy_test_util_spdy3.h
diff --git a/net/spdy/spdy_test_util_spdy3.h b/net/spdy/spdy_test_util_spdy3.h
index edc55ffcfbe8e4304ee6c16075ce5a16518a4347..cd5cda2c42642816746592771a0e7ba3972511f7 100644
--- a/net/spdy/spdy_test_util_spdy3.h
+++ b/net/spdy/spdy_test_util_spdy3.h
@@ -360,6 +360,8 @@ class SpdySessionDependencies {
   static HttpNetworkSession* SpdyCreateSessionDeterministic(
       SpdySessionDependencies* session_deps);
 
+  net::HttpNetworkSession::Params CreateSessionParams();
+
   // NOTE: host_resolver must be ordered before http_auth_handler_factory.
   scoped_ptr<MockHostResolverBase> host_resolver;
   scoped_ptr<CertVerifier> cert_verifier;
@@ -370,6 +372,7 @@ class SpdySessionDependencies {
   scoped_ptr<HttpAuthHandlerFactory> http_auth_handler_factory;
   HttpServerPropertiesImpl http_server_properties;
   std::string trusted_spdy_proxy;
+  NetLog* net_log;
 };
 
 class SpdyURLRequestContext : public URLRequestContext {