Add QuicStrCat.

net/quic/core/quic_stream_sequencer_buffer_test.cc

 // Copyright (c) 2015 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/quic_stream_sequencer_buffer.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <string>
 #include <utility>
@@ skipping 126 matching lines @@
 
 TEST_F(QuicStreamSequencerBufferTest, OnStreamDataInvalidSource) {
   // Pass in an invalid source, expects to return error.
   StringPiece source;
   source = StringPiece(nullptr, 1024);
   size_t written;
   clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
   QuicTime t = clock_.ApproximateNow();
   EXPECT_EQ(QUIC_STREAM_SEQUENCER_INVALID_STATE,
             buffer_->OnStreamData(800, source, t, &written, &error_details_));
-  EXPECT_EQ(
-      0u, error_details_.find("QuicStreamSequencerBuffer error: OnStreamData()"
-                              " dest == nullptr: false"
-                              " source == nullptr: true"));
+  EXPECT_EQ(0u, error_details_.find(QuicStrCat(
+                    "QuicStreamSequencerBuffer error: OnStreamData() "
+                    "dest == nullptr: ",
+                    false, " source == nullptr: ", true)));
 }
 
 TEST_F(QuicStreamSequencerBufferTest, OnStreamDataWithOverlap) {
   string source(1024, 'a');
   // Write something into [800, 1824)
   size_t written;
   clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
   QuicTime t1 = clock_.ApproximateNow();
   EXPECT_EQ(QUIC_NO_ERROR,
             buffer_->OnStreamData(800, source, t1, &written, &error_details_));
@@ skipping 872 matching lines @@
   EXPECT_LE(bytes_to_buffer_, total_bytes_read_) << "iterations: "
                                                  << iterations;
   EXPECT_LE(bytes_to_buffer_, total_bytes_written_);
 }
 
 }  // anonymous namespace
 
 }  // namespace test
 
 }  // namespace net