Add QuicStringPiece which is actually StringPiece.

net/quic/core/quic_stream_sequencer_test.cc

Index: net/quic/core/quic_stream_sequencer_test.cc
diff --git a/net/quic/core/quic_stream_sequencer_test.cc b/net/quic/core/quic_stream_sequencer_test.cc
index a7b64b5cbd3ca8cfc4cd8cb6337bee9161fc19f7..a75ca27b0a7c6a7b64e00d6fe1130aab5f7a8c69 100644
--- a/net/quic/core/quic_stream_sequencer_test.cc
+++ b/net/quic/core/quic_stream_sequencer_test.cc
@@ -13,6 +13,7 @@
 #include "net/quic/core/quic_stream.h"
 #include "net/quic/core/quic_utils.h"
 #include "net/quic/platform/api/quic_logging.h"
+#include "net/quic/platform/api/quic_string_piece.h"
 #include "net/quic/test_tools/mock_clock.h"
 #include "net/quic/test_tools/quic_stream_sequencer_peer.h"
 #include "net/quic/test_tools/quic_test_utils.h"
@@ -21,7 +22,6 @@
 #include "testing/gmock_mutant.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using base::StringPiece;
 using std::string;
 using testing::_;
 using testing::AnyNumber;
@@ -112,7 +112,7 @@ class QuicStreamSequencerTest : public ::testing::Test {
     return true;
   }
 
-  bool VerifyIovec(const iovec& iovec, StringPiece expected) {
+  bool VerifyIovec(const iovec& iovec, QuicStringPiece expected) {
     if (iovec.iov_len != expected.length()) {
       QUIC_LOG(ERROR) << "Invalid length: " << iovec.iov_len << " vs "
                       << expected.length();
@@ -571,10 +571,12 @@ TEST_F(QuicStreamSequencerTest, DontAcceptOverlappingFrames) {
   // The peer should never send us non-identical stream frames which contain
   // overlapping byte ranges - if they do, we close the connection.
 
-  QuicStreamFrame frame1(kClientDataStreamId1, false, 1, StringPiece("hello"));
+  QuicStreamFrame frame1(kClientDataStreamId1, false, 1,
+                         QuicStringPiece("hello"));
   sequencer_->OnStreamFrame(frame1);
 
-  QuicStreamFrame frame2(kClientDataStreamId1, false, 2, StringPiece("hello"));
+  QuicStreamFrame frame2(kClientDataStreamId1, false, 2,
+                         QuicStringPiece("hello"));
   EXPECT_CALL(stream_,
               CloseConnectionWithDetails(QUIC_OVERLAPPING_STREAM_DATA, _))
       .Times(1);
@@ -666,7 +668,7 @@ TEST_F(QuicStreamSequencerTest, OutOfOrderTimestamps) {
 TEST_F(QuicStreamSequencerTest, OnStreamFrameWithNullSource) {
   // Pass in a frame with data pointing to null address, expect to close
   // connection with error.
-  StringPiece source;
+  QuicStringPiece source;
   source.set(nullptr, 5u);
   QuicStreamFrame frame(kClientDataStreamId1, false, 1, source);
   EXPECT_CALL(stream_, CloseConnectionWithDetails(