Fix WeakPtrFactory member order in net/spdy and net/dns

net/dns/dns_config_service_posix.cc

Index: net/dns/dns_config_service_posix.cc
diff --git a/net/dns/dns_config_service_posix.cc b/net/dns/dns_config_service_posix.cc
index 0644d4d42947142a935786337a291fbd7e0c3d90..2c298ddedbb8c98ce46a950929eba2616322baa5 100644
--- a/net/dns/dns_config_service_posix.cc
+++ b/net/dns/dns_config_service_posix.cc
@@ -202,8 +202,8 @@ ConfigParsePosixResult ReadDnsConfig(DnsConfig* dns_config) {
 class DnsConfigServicePosix::Watcher {
  public:
   explicit Watcher(DnsConfigServicePosix* service)
-      : weak_factory_(this),
-        service_(service) {}
+      : service_(service),
+        weak_factory_(this) {}
   ~Watcher() {}
 
   bool Watch() {
@@ -246,11 +246,12 @@ class DnsConfigServicePosix::Watcher {
     service_->OnHostsChanged(!error);
   }
 
-  base::WeakPtrFactory<Watcher> weak_factory_;
   DnsConfigServicePosix* service_;
   DnsConfigWatcher config_watcher_;
   base::FilePathWatcher hosts_watcher_;
 
+  base::WeakPtrFactory<Watcher> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(Watcher);
 };