UrlSafeBase64Encode  538 net/base/sdch_manager.cc   UrlSafeBase64Encode(first_48_bits, client_hash);
UrlSafeBase64Encode  539 net/base/sdch_manager.cc   UrlSafeBase64Encode(second_48_bits, server_hash);
UrlSafeBase64Encode  357 net/base/sdch_manager.h   static void UrlSafeBase64Encode(const std::string& input,