Sync'ing DefaultRandom code with internal code.

net/quic/crypto/quic_random.cc

Index: net/quic/crypto/quic_random.cc
diff --git a/net/quic/crypto/quic_random.cc b/net/quic/crypto/quic_random.cc
index 73fce2ef2cfcc6b1ef5e422659774dbe1b7f9799..6f4601306609db562e1ed6a97c220e4727f56bad 100644
--- a/net/quic/crypto/quic_random.cc
+++ b/net/quic/crypto/quic_random.cc
@@ -23,7 +23,7 @@ class DefaultRandom : public QuicRandom {
                       size_t entropy_len) OVERRIDE;
 
  private:
-  DefaultRandom();
+  DefaultRandom() {};
   virtual ~DefaultRandom() {}
 
   friend struct DefaultSingletonTraits<DefaultRandom>;
@@ -48,9 +48,6 @@ void DefaultRandom::Reseed(const void* additional_entropy, size_t entropy_len) {
   // No such function exists in crypto/random.h.
 }
 
-DefaultRandom::DefaultRandom() {
-}
-
 }  // namespace
 
 // static