Replace QuicheStringPiece with absl::string_view

Tested:
    TAP for global presubmit queue passed after automated deflaking of failures: http://mondo/deflaker/run/96cd5e40-b4cb-4ad8-8e9f-62d5c247385b http://mondo/deflaker/run/0a6209be-9013-4346-bd74-893b793b94d1 http://mondo/deflaker/run/f97a1fae-e543-4aea-a52f-88ddf6054d33
    http://test/OCL:335945875:BASE:335945937:1602132930213:6b6e6496
PiperOrigin-RevId: 336088095
Change-Id: I3a39387a5c382c401e0cf55b937dbd5babc7bdf3
diff --git a/quic/tools/quic_simple_server_stream.h b/quic/tools/quic_simple_server_stream.h
index add4a12..254fe8d 100644
--- a/quic/tools/quic_simple_server_stream.h
+++ b/quic/tools/quic_simple_server_stream.h
@@ -5,11 +5,11 @@
 #ifndef QUICHE_QUIC_TOOLS_QUIC_SIMPLE_SERVER_STREAM_H_
 #define QUICHE_QUIC_TOOLS_QUIC_SIMPLE_SERVER_STREAM_H_
 
+#include "absl/strings/string_view.h"
 #include "net/third_party/quiche/src/quic/core/http/quic_spdy_server_stream_base.h"
 #include "net/third_party/quiche/src/quic/core/quic_packets.h"
 #include "net/third_party/quiche/src/quic/tools/quic_backend_response.h"
 #include "net/third_party/quiche/src/quic/tools/quic_simple_server_backend.h"
-#include "net/third_party/quiche/src/common/platform/api/quiche_string_piece.h"
 #include "net/third_party/quiche/src/spdy/core/spdy_framer.h"
 
 namespace quic {
@@ -77,12 +77,12 @@
 
   // Sends the response header and body, but not the fin.
   void SendIncompleteResponse(spdy::SpdyHeaderBlock response_headers,
-                              quiche::QuicheStringPiece body);
+                              absl::string_view body);
 
   void SendHeadersAndBody(spdy::SpdyHeaderBlock response_headers,
-                          quiche::QuicheStringPiece body);
+                          absl::string_view body);
   void SendHeadersAndBodyAndTrailers(spdy::SpdyHeaderBlock response_headers,
-                                     quiche::QuicheStringPiece body,
+                                     absl::string_view body,
                                      spdy::SpdyHeaderBlock response_trailers);
 
   spdy::SpdyHeaderBlock* request_headers() { return &request_headers_; }