Convert string16 -> base::string16 in components/

components/webdata/encryptor/encryptor_mac.mm

Index: components/webdata/encryptor/encryptor_mac.mm
diff --git a/components/webdata/encryptor/encryptor_mac.mm b/components/webdata/encryptor/encryptor_mac.mm
index 67c463136b558c3db1494b1e5e948e34aec8ea3b..e402578d59435eaf71f8ec6719eb61483e7ae436 100644
--- a/components/webdata/encryptor/encryptor_mac.mm
+++ b/components/webdata/encryptor/encryptor_mac.mm
@@ -69,13 +69,13 @@ crypto::SymmetricKey* GetEncryptionKey() {
 
 }  // namespace
 
-bool Encryptor::EncryptString16(const string16& plaintext,
+bool Encryptor::EncryptString16(const base::string16& plaintext,
                                 std::string* ciphertext) {
   return EncryptString(UTF16ToUTF8(plaintext), ciphertext);
 }
 
 bool Encryptor::DecryptString16(const std::string& ciphertext,
-                                string16* plaintext) {
+                                base::string16* plaintext) {
   std::string utf8;
   if (!DecryptString(ciphertext, &utf8))
     return false;