Remove unused user email argument from nss_util.

crypto/nss_util.cc

Index: crypto/nss_util.cc
diff --git a/crypto/nss_util.cc b/crypto/nss_util.cc
index f0c726d4796437ef9cf2046e21dbc75ffe0009ec..cc4df1c9c5af753466308dfe560c179e2901fa78 100644
--- a/crypto/nss_util.cc
+++ b/crypto/nss_util.cc
@@ -450,10 +450,8 @@ class NSSInitSingleton {
     return crypto::ScopedPK11Slot(slot);
   }
 
-  bool InitializeNSSForChromeOSUser(
-      const std::string& email,
-      const std::string& username_hash,
-      const base::FilePath& path) {
+  bool InitializeNSSForChromeOSUser(const std::string& username_hash,
+                                    const base::FilePath& path) {
     DCHECK(thread_checker_.CalledOnValidThread());
     if (chromeos_user_map_.find(username_hash) != chromeos_user_map_.end()) {
       // This user already exists in our mapping.
@@ -1045,12 +1043,10 @@ void InitializeTPMTokenAndSystemSlot(
                                                         callback);
 }
 
-bool InitializeNSSForChromeOSUser(
-    const std::string& email,
-    const std::string& username_hash,
-    const base::FilePath& path) {
-  return g_nss_singleton.Get().InitializeNSSForChromeOSUser(
-      email, username_hash, path);
+bool InitializeNSSForChromeOSUser(const std::string& username_hash,
+                                  const base::FilePath& path) {
+  return g_nss_singleton.Get().InitializeNSSForChromeOSUser(username_hash,
+                                                            path);
 }
 
 bool ShouldInitializeTPMForChromeOSUser(const std::string& username_hash) {