Remove QuicUtils::AsChars by casting directly. No behavior change.

net/tools/quic/quic_simple_server_test.cc

Index: net/tools/quic/quic_simple_server_test.cc
diff --git a/net/tools/quic/quic_simple_server_test.cc b/net/tools/quic/quic_simple_server_test.cc
index 091c08761f5746b330ac5a5b21b7e9476d27c921..34efb1ffa81a3ad413c305ef292918c9e6bd9eea 100644
--- a/net/tools/quic/quic_simple_server_test.cc
+++ b/net/tools/quic/quic_simple_server_test.cc
@@ -62,9 +62,9 @@ TEST_F(QuicChromeServerDispatchPacketTest, DispatchPacket) {
                                   0xBC, 0x9A, 0x78, 0x56, 0x34, 0x12,
                                   // private flags
                                   0x00};
-  QuicReceivedPacket encrypted_valid_packet(QuicUtils::AsChars(valid_packet),
-                                            arraysize(valid_packet),
-                                            QuicTime::Zero(), false);
+  QuicReceivedPacket encrypted_valid_packet(
+      reinterpret_cast<char*>(valid_packet), arraysize(valid_packet),
+      QuicTime::Zero(), false);
 
   EXPECT_CALL(dispatcher_, ProcessPacket(_, _, _)).Times(1);
   DispatchPacket(encrypted_valid_packet);