Extracting NetLog inner classes into their own classes.

net/cert/multi_threaded_cert_verifier.cc

Index: net/cert/multi_threaded_cert_verifier.cc
diff --git a/net/cert/multi_threaded_cert_verifier.cc b/net/cert/multi_threaded_cert_verifier.cc
index 5c9b4bf9ef299f4a9d368afd9c4e6a0335658f2c..b2e8e28203c9a15a321b2e16c5255e5b25efd497 100644
--- a/net/cert/multi_threaded_cert_verifier.cc
+++ b/net/cert/multi_threaded_cert_verifier.cc
@@ -30,9 +30,11 @@
 #include "net/cert/crl_set.h"
 #include "net/cert/x509_certificate.h"
 #include "net/cert/x509_certificate_net_log_param.h"
-#include "net/log/net_log.h"
+#include "net/log/net_log_capture_mode.h"
 #include "net/log/net_log_event_type.h"
+#include "net/log/net_log_source.h"
 #include "net/log/net_log_source_type.h"
+#include "net/log/net_log_with_source.h"
 
 #if defined(USE_NSS_CERTS)
 #include <private/pprthred.h>  // PR_DetachThread
@@ -40,6 +42,8 @@
 
 namespace net {
 
+class NetLogCaptureMode;
+
 ////////////////////////////////////////////////////////////////////////////
 //
 // MultiThreadedCertVerifier is a thread-unsafe object which lives, dies, and is