Extracting NetLog inner classes into their own classes.

net/quic/chromium/quic_stream_factory.h

Index: net/quic/chromium/quic_stream_factory.h
diff --git a/net/quic/chromium/quic_stream_factory.h b/net/quic/chromium/quic_stream_factory.h
index 0f0d988de39d36512805175b654dcb23a7b89dd6..8fe44cdf32fe083311057744009f8f45f81d8b90 100644
--- a/net/quic/chromium/quic_stream_factory.h
+++ b/net/quic/chromium/quic_stream_factory.h
@@ -27,7 +27,7 @@
 #include "net/cert/cert_database.h"
 #include "net/http/http_server_properties.h"
 #include "net/http/http_stream_factory.h"
-#include "net/log/net_log.h"
+#include "net/log/net_log_with_source.h"
 #include "net/proxy/proxy_server.h"
 #include "net/quic/chromium/network_connection.h"
 #include "net/quic/chromium/quic_chromium_client_session.h"
@@ -39,6 +39,10 @@
 #include "net/quic/core/quic_server_id.h"
 #include "net/ssl/ssl_config_service.h"
 
+namespace base {
+class Value;
+}
+
 namespace net {
 
 class CTPolicyEnforcer;
@@ -48,6 +52,7 @@ class ClientSocketFactory;
 class CTVerifier;
 class HostResolver;
 class HttpServerProperties;
+class NetLog;
 class QuicClock;
 class QuicChromiumAlarmFactory;
 class QuicChromiumConnectionHelper;