Enable support for Rice encoding

components/safe_browsing_db/v4_update_protocol_manager_unittest.cc

 // Copyright 2016 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 "components/safe_browsing_db/v4_update_protocol_manager.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/base64.h"
@@ skipping 290 matching lines @@
 TEST_F(V4UpdateProtocolManagerTest, TestBase64EncodingUsesUrlEncoding) {
   // NOTE(vakh): I handpicked this value for state by generating random strings
   // and picked the one that leads to a '-' in the base64 url encoded request
   // output.
   std::string state_minus = "z-R~3ruViQH";
   StoreStateMap store_state_map_minus{
       {UpdateListIdentifier(LINUX_PLATFORM, URL, MALWARE_THREAT), state_minus}};
   std::string encoded_request_with_minus =
       V4UpdateProtocolManager::GetBase64SerializedUpdateRequestProto(
           store_state_map_minus);
-  EXPECT_EQ("GhcIARACGgt6LVJ-M3J1VmlRSCICIAEoAQ==", encoded_request_with_minus);
+  EXPECT_EQ("GhkIARACGgt6LVJ-M3J1VmlRSCIEIAEgAigB", encoded_request_with_minus);
 
   // NOTE(vakh): Same process for chosing this string. I am representing it
   // in base64 encoded form because the actual state value contains non-ASCII
   // characters.
   std::string base64_encoded_state_underscore = "VTFfITBf4lBM";
   std::string state_underscore;
   base::Base64Decode(base64_encoded_state_underscore, &state_underscore);
   StoreStateMap store_state_map_underscore{
       {UpdateListIdentifier(LINUX_PLATFORM, URL, MALWARE_THREAT),
        state_underscore}};
   std::string encoded_request_with_underscore =
       V4UpdateProtocolManager::GetBase64SerializedUpdateRequestProto(
           store_state_map_underscore);
-  EXPECT_EQ("GhUIARACGglVMV8hMF_iUEwiAiABKAE=",
+  EXPECT_EQ("GhcIARACGglVMV8hMF_iUEwiBCABIAIoAQ==",
             encoded_request_with_underscore);
 }
 
 }  // namespace safe_browsing