Fix WeakPtrFactory member ordering in chrome/browser

chrome/browser/net/dns_probe_runner.h

Index: chrome/browser/net/dns_probe_runner.h
diff --git a/chrome/browser/net/dns_probe_runner.h b/chrome/browser/net/dns_probe_runner.h
index 3f294c24f57dfef70fdc8f84569f537c1c0ec451..96c64befa71e66766dd3bce9590cc65a9e8fd916 100644
--- a/chrome/browser/net/dns_probe_runner.h
+++ b/chrome/browser/net/dns_probe_runner.h
@@ -63,8 +63,6 @@ class DnsProbeRunner {
                              const net::DnsResponse* response);
   void CallCallback();
 
-  base::WeakPtrFactory<DnsProbeRunner> weak_factory_;
-
   scoped_ptr<net::DnsClient> client_;
 
   // The callback passed to |RunProbe|.  Cleared right before calling the
@@ -77,6 +75,8 @@ class DnsProbeRunner {
 
   Result result_;
 
+  base::WeakPtrFactory<DnsProbeRunner> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(DnsProbeRunner);
 };