Remove SpdyStringPiece; use QuicheStringPiece instead.

gfe-relnote: n/a, no functional change.
PiperOrigin-RevId: 288029999
Change-Id: If83322cadaac9647f246fa8ef18f5ce870995aa3
diff --git a/spdy/core/spdy_pinnable_buffer_piece.h b/spdy/core/spdy_pinnable_buffer_piece.h
index 3032ad7..469c0d3 100644
--- a/spdy/core/spdy_pinnable_buffer_piece.h
+++ b/spdy/core/spdy_pinnable_buffer_piece.h
@@ -9,8 +9,8 @@
 
 #include <memory>
 
+#include "net/third_party/quiche/src/common/platform/api/quiche_string_piece.h"
 #include "net/third_party/quiche/src/spdy/platform/api/spdy_export.h"
-#include "net/third_party/quiche/src/spdy/platform/api/spdy_string_piece.h"
 
 namespace spdy {
 
@@ -27,8 +27,8 @@
 
   const char* buffer() const { return buffer_; }
 
-  explicit operator SpdyStringPiece() const {
-    return SpdyStringPiece(buffer_, length_);
+  explicit operator quiche::QuicheStringPiece() const {
+    return quiche::QuicheStringPiece(buffer_, length_);
   }
 
   // Allocates and copies the buffer to internal storage.