DnsQuery: changed raw function pointer to callback.

net/base/dns_query.h

Index: net/base/dns_query.h
diff --git a/net/base/dns_query.h b/net/base/dns_query.h
index c0884bf2946f14d6849732e00baa290a452d7a46..7a5e9a133cb499659f2d23ec3167cf09008d0a63 100644
--- a/net/base/dns_query.h
+++ b/net/base/dns_query.h
@@ -8,6 +8,7 @@
 
 #include <string>
 
+#include "base/rand_util.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_api.h"
 #include "net/base/net_util.h"
@@ -23,7 +24,9 @@ class NET_TEST DnsQuery {
   // Every generated object has a random ID, hence two objects generated
   // with the same set of constructor arguments are generally not equal;
   // there is a 1/2^16 chance of them being equal due to size of |id_|.
-  DnsQuery(const std::string& dns_name, uint16 qtype, uint64 (*prng)());
+  DnsQuery(const std::string& dns_name,
+           uint16 qtype,
+           const base::RandIntCallback& rand_int);
   ~DnsQuery();
 
   // Clones |this| verbatim with ID field of the header regenerated.
@@ -64,7 +67,7 @@ class NET_TEST DnsQuery {
   scoped_refptr<IOBufferWithSize> io_buffer_;
 
   // PRNG function for generating IDs.
-  uint64 (*prng_)();
+  base::RandIntCallback rand_int_;
 };
 
 }  // namespace net