Add QuicStringPiece which is actually StringPiece.

net/quic/core/frames/quic_stream_frame.cc

 // Copyright (c) 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 "net/quic/core/frames/quic_stream_frame.h"
 
 #include "net/quic/platform/api/quic_logging.h"
 
-using base::StringPiece;
-
 namespace net {
 
 void StreamBufferDeleter::operator()(char* buffer) const {
   if (allocator_ != nullptr && buffer != nullptr) {
     allocator_->Delete(buffer);
   }
 }
 
 UniqueStreamBuffer NewStreamBuffer(QuicBufferAllocator* allocator,
                                    size_t size) {
   return UniqueStreamBuffer(allocator->New(size),
                             StreamBufferDeleter(allocator));
 }
 
 QuicStreamFrame::QuicStreamFrame()
     : QuicStreamFrame(0, false, 0, nullptr, 0, nullptr) {}
 
 QuicStreamFrame::QuicStreamFrame(QuicStreamId stream_id,
                                  bool fin,
                                  QuicStreamOffset offset,
-                                 StringPiece data)
+                                 QuicStringPiece data)
     : QuicStreamFrame(stream_id,
                       fin,
                       offset,
                       data.data(),
                       data.length(),
                       nullptr) {}
 
 QuicStreamFrame::QuicStreamFrame(QuicStreamId stream_id,
                                  bool fin,
                                  QuicStreamOffset offset,
@@ skipping 31 matching lines @@
 
 std::ostream& operator<<(std::ostream& os,
                          const QuicStreamFrame& stream_frame) {
   os << "{ stream_id: " << stream_frame.stream_id
      << ", fin: " << stream_frame.fin << ", offset: " << stream_frame.offset
      << ", length: " << stream_frame.data_length << " }\n";
   return os;
 }
 
 }  // namespace net