Fix size_t truncations in net for 64-bit VS 2015

net/quic/quic_connection_test.cc

 // Copyright (c) 2012 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/quic_connection.h"
 
 #include <ostream>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 783 matching lines @@
     QuicFrames frames;
     frames.push_back(frame);
     scoped_ptr<QuicPacket> packet(ConstructPacket(header, frames));
 
     char buffer[kMaxPacketSize];
     size_t encrypted_length =
         framer_.EncryptPayload(level, number, *packet, buffer, kMaxPacketSize);
     connection_.ProcessUdpPacket(
         kSelfAddress, kPeerAddress,
         QuicEncryptedPacket(buffer, encrypted_length, false));
-    return encrypted_length;
+    return base::checked_cast<QuicPacketEntropyHash>(encrypted_length);
   }
 
   size_t ProcessDataPacket(QuicPacketNumber number,
                            QuicFecGroupNumber fec_group,
                            bool entropy_flag) {
     return ProcessDataPacketAtLevel(number, fec_group, entropy_flag,
                                     ENCRYPTION_NONE);
   }
 
   size_t ProcessDataPacketAtLevel(QuicPacketNumber number,
@@ skipping 4627 matching lines @@
   EXPECT_EQ(1u, writer_->stream_frames().size());
   EXPECT_TRUE(connection_.GetSendAlarm()->IsSet());
   EXPECT_EQ(clock_.Now().Add(QuicTime::Delta::FromMilliseconds(2)),
             connection_.GetSendAlarm()->deadline());
   writer_->Reset();
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net