Make ReliableQuicStream::Write use base::StringPiece, not std::string

webrtc/p2p/quic/reliablequicstream.cc

Index: webrtc/p2p/quic/reliablequicstream.cc
diff --git a/webrtc/p2p/quic/reliablequicstream.cc b/webrtc/p2p/quic/reliablequicstream.cc
index ed44388edb52490effc9433650f51d88b904b59b..5b65f1e7c75ba926cc04de3966d27035376e3359 100644
--- a/webrtc/p2p/quic/reliablequicstream.cc
+++ b/webrtc/p2p/quic/reliablequicstream.cc
@@ -43,7 +43,7 @@ rtc::StreamResult ReliableQuicStream::Write(const char* data,
                                             size_t len,
                                             bool fin) {
   // Writes the data, or buffers it.
-  WriteOrBufferData(std::string(data, len), fin, nullptr);
+  WriteOrBufferData(base::StringPiece(data, len), fin, nullptr);
   if (HasBufferedData()) {
     return rtc::StreamResult(rtc::SR_BLOCK);
   }