net: Add NET_API to net/base

net/base/registry_controlled_domain.h

Index: net/base/registry_controlled_domain.h
===================================================================
--- net/base/registry_controlled_domain.h	(revision 85332)
+++ net/base/registry_controlled_domain.h	(working copy)
@@ -114,6 +114,7 @@
 #include <string>
 
 #include "base/basictypes.h"
+#include "net/base/net_api.h"
 
 class GURL;
 
@@ -126,7 +127,7 @@
 struct RegistryControlledDomainServiceSingletonTraits;
 
 // This class is a singleton.
-class RegistryControlledDomainService {
+class NET_API RegistryControlledDomainService {
  public:
    ~RegistryControlledDomainService() { }