Replace QuicString with std::string, pass 1

This replaces QuicString with std::string in all of the "QUIC proper".  I will
delete QuicString once all code using it is gone.

gfe-relnote: n/a (no functional change)
PiperOrigin-RevId: 237872023
Change-Id: I82de62c9855516b15039734d05155917e68ff4ee
diff --git a/quic/core/quic_crypto_stream_test.cc b/quic/core/quic_crypto_stream_test.cc
index 26ed335..263910b 100644
--- a/quic/core/quic_crypto_stream_test.cc
+++ b/quic/core/quic_crypto_stream_test.cc
@@ -118,7 +118,7 @@
 }
 
 TEST_F(QuicCryptoStreamTest, ProcessBadData) {
-  QuicString bad(message_data_->data(), message_data_->length());
+  std::string bad(message_data_->data(), message_data_->length());
   const int kFirstTagIndex = sizeof(uint32_t) +  // message tag
                              sizeof(uint16_t) +  // number of tag-value pairs
                              sizeof(uint16_t);   // padding
@@ -148,7 +148,7 @@
   InSequence s;
   // Send [0, 1350) in ENCRYPTION_NONE.
   EXPECT_EQ(ENCRYPTION_NONE, connection_->encryption_level());
-  QuicString data(1350, 'a');
+  std::string data(1350, 'a');
   EXPECT_CALL(
       session_,
       WritevData(_,
@@ -208,7 +208,7 @@
   InSequence s;
   // Send [0, 1350) in ENCRYPTION_NONE.
   EXPECT_EQ(ENCRYPTION_NONE, connection_->encryption_level());
-  QuicString data(1350, 'a');
+  std::string data(1350, 'a');
   EXPECT_CALL(*connection_, SendCryptoData(ENCRYPTION_NONE, 1350, 0))
       .WillOnce(Invoke(connection_,
                        &MockQuicConnection::QuicConnection_SendCryptoData));
@@ -258,7 +258,7 @@
   }
   // Send [0, 1350) in ENCRYPTION_NONE.
   EXPECT_EQ(ENCRYPTION_NONE, connection_->encryption_level());
-  QuicString data(1350, 'a');
+  std::string data(1350, 'a');
   EXPECT_CALL(
       session_,
       WritevData(_,
@@ -300,7 +300,7 @@
   }
   // Send [0, 1350) in ENCRYPTION_NONE.
   EXPECT_EQ(ENCRYPTION_NONE, connection_->encryption_level());
-  QuicString data(1350, 'a');
+  std::string data(1350, 'a');
   EXPECT_CALL(*connection_, SendCryptoData(ENCRYPTION_NONE, 1350, 0))
       .WillOnce(Invoke(connection_,
                        &MockQuicConnection::QuicConnection_SendCryptoData));
@@ -344,7 +344,7 @@
   InSequence s;
   // Send [0, 1350) in ENCRYPTION_NONE.
   EXPECT_EQ(ENCRYPTION_NONE, connection_->encryption_level());
-  QuicString data(1350, 'a');
+  std::string data(1350, 'a');
   EXPECT_CALL(
       session_,
       WritevData(_,
@@ -417,7 +417,7 @@
   InSequence s;
   // Send [0, 1350) in ENCRYPTION_NONE.
   EXPECT_EQ(ENCRYPTION_NONE, connection_->encryption_level());
-  QuicString data(1350, 'a');
+  std::string data(1350, 'a');
   EXPECT_CALL(*connection_, SendCryptoData(ENCRYPTION_NONE, 1350, 0))
       .WillOnce(Invoke(connection_,
                        &MockQuicConnection::QuicConnection_SendCryptoData));
@@ -473,7 +473,7 @@
   if (connection_->transport_version() >= QUIC_VERSION_47) {
     return;
   }
-  QuicString data(1350, 'a');
+  std::string data(1350, 'a');
   EXPECT_CALL(
       session_,
       WritevData(_,
@@ -504,7 +504,7 @@
   }
   // Send [0, 1350) in ENCRYPTION_NONE.
   EXPECT_EQ(ENCRYPTION_NONE, connection_->encryption_level());
-  QuicString data(1350, 'a');
+  std::string data(1350, 'a');
   EXPECT_CALL(*connection_, SendCryptoData(ENCRYPTION_NONE, 1350, 0))
       .WillOnce(Invoke(connection_,
                        &MockQuicConnection::QuicConnection_SendCryptoData));