Order function definitions in base/ according to the header.

base/hmac_nss.cc

Index: base/hmac_nss.cc
diff --git a/base/hmac_nss.cc b/base/hmac_nss.cc
index 2ca4f678d20cfab5920de656d18df7c6ae7875aa..af0b3eb4b11987cb85e5a45f637f194cade6b66d 100644
--- a/base/hmac_nss.cc
+++ b/base/hmac_nss.cc
@@ -36,6 +36,9 @@ HMAC::HMAC(HashAlgorithm hash_alg)
   }
 }
 
+HMAC::~HMAC() {
+}
+
 bool HMAC::Init(const unsigned char *key, int key_length) {
   base::EnsureNSSInit();
 
@@ -70,9 +73,6 @@ bool HMAC::Init(const unsigned char *key, int key_length) {
   return true;
 }
 
-HMAC::~HMAC() {
-}
-
 bool HMAC::Sign(const std::string& data,
                 unsigned char* digest,
                 int digest_length) {