Add a new QUIC platform API for text utilities.

net/quic/core/crypto/quic_compressed_certs_cache_test.cc

Index: net/quic/core/crypto/quic_compressed_certs_cache_test.cc
diff --git a/net/quic/core/crypto/quic_compressed_certs_cache_test.cc b/net/quic/core/crypto/quic_compressed_certs_cache_test.cc
index 7757364f1232366101f4caec3b687ba7581ab642..2cf9746f797bc077ed6f2683e882b805425ef90f 100644
--- a/net/quic/core/crypto/quic_compressed_certs_cache_test.cc
+++ b/net/quic/core/crypto/quic_compressed_certs_cache_test.cc
@@ -6,8 +6,8 @@
 
 #include "base/logging.h"
 #include "base/macros.h"
-#include "base/strings/string_number_conversions.h"
 #include "net/quic/core/crypto/cert_compressor.h"
+#include "net/quic/platform/api/quic_text_utils.h"
 #include "net/quic/test_tools/crypto_test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -56,10 +56,12 @@ TEST_F(QuicCompressedCertsCacheTest, CacheMiss) {
 
   certs_cache_.Insert(chain, common_certs, cached_certs, compressed);
 
-  EXPECT_EQ(nullptr, certs_cache_.GetCompressedCert(
-                         chain, "mismatched common certs", cached_certs));
-  EXPECT_EQ(nullptr, certs_cache_.GetCompressedCert(chain, common_certs,
-                                                    "mismatched cached certs"));
+  EXPECT_EQ(nullptr,
+            certs_cache_.GetCompressedCert(chain, "mismatched common certs",
+                                           cached_certs));
+  EXPECT_EQ(nullptr,
+            certs_cache_.GetCompressedCert(chain, common_certs,
+                                           "mismatched cached certs"));
 
   // A different chain though with equivalent certs should get a cache miss.
   QuicReferenceCountedPointer<ProofSource::Chain> chain2(
@@ -85,7 +87,8 @@ TEST_F(QuicCompressedCertsCacheTest, CacheMissDueToEviction) {
   for (unsigned int i = 0;
        i < QuicCompressedCertsCache::kQuicCompressedCertsCacheSize; i++) {
     EXPECT_EQ(certs_cache_.Size(), i + 1);
-    certs_cache_.Insert(chain, IntToString(i), "", IntToString(i));
+    certs_cache_.Insert(chain, QuicTextUtils::Uint64ToString(i), "",
+                        QuicTextUtils::Uint64ToString(i));
   }
   EXPECT_EQ(certs_cache_.MaxSize(), certs_cache_.Size());