Enable safe browsing tests exercising VerifyMAC....

chrome/browser/safe_browsing/safe_browsing_util.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/safe_browsing/safe_browsing_util.h"
 
 #include "base/hmac.h"
 #include "base/logging.h"
 #include "base/sha2.h"
 #include "base/string_util.h"
@@ skipping 119 matching lines @@
         break;
       case '-':
         (*decoded)[i] = '+';
         break;
     }
   }
 }
 
 bool VerifyMAC(const std::string& key, const std::string& mac,
                const char* data, int data_length) {
-#if !defined(OS_WIN)
-  // TODO(port): Remove #defines when linking issue with modp_b64 is resolved.
-  NOTIMPLEMENTED();
-  return false;
-#endif
   std::string key_copy = key;
   DecodeWebSafe(&key_copy);
   std::string decoded_key;
   net::Base64Decode(key_copy, &decoded_key);
 
   std::string mac_copy = mac;
   DecodeWebSafe(&mac_copy);
   std::string decoded_mac;
   net::Base64Decode(mac_copy, &decoded_mac);
 
@@ skipping 459 matching lines @@
   // Validate that the next entry is wholly contained inside of |data_|.
   const char* end = data_.get() + size_;
   if (next + SBEntry::kMinSize <= end && next + next_entry->Size() <= end) {
     *entry = next_entry;
     return true;
   }
 
   return false;
 }