Fix size_t truncations in media for 64-bit VS 2015

media/cast/net/rtp/packet_storage_unittest.cc

 // Copyright 2014 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 "media/cast/net/rtp/packet_storage.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 #include <vector>
@@ skipping 15 matching lines @@
                         PacketStorage* storage) {
   const base::TimeTicks kTicks;
   const int kSsrc = 1;
   for (size_t i = 0; i < number_of_frames; ++i) {
     SendPacketVector packets;
     // First frame has 1 packet, second frame has 2 packets, etc.
     const size_t kNumberOfPackets = i + 1;
     for (size_t j = 0; j < kNumberOfPackets; ++j) {
       Packet test_packet(1, 0);
       packets.push_back(
-          std::make_pair(
-              PacedPacketSender::MakePacketKey(kTicks, kSsrc, j),
-              new base::RefCountedData<Packet>(test_packet)));
+          std::make_pair(PacedPacketSender::MakePacketKey(
+                             kTicks, kSsrc, base::checked_cast<uint16>(j)),
+                         new base::RefCountedData<Packet>(test_packet)));
     }
     storage->StoreFrame(first_frame_id, packets);
     ++first_frame_id;
   }
 }
 
 TEST(PacketStorageTest, NumberOfStoredFrames) {
   PacketStorage storage;
 
   uint32 frame_id = 0;
@@ skipping 69 matching lines @@
   EXPECT_EQ(1u, storage.GetNumberOfStoredFrames());
   EXPECT_FALSE(storage.GetFrame8(kFirstFrameId + 4));
 
   storage.ReleaseFrame(kFirstFrameId + 1);
   EXPECT_EQ(0u, storage.GetNumberOfStoredFrames());
   EXPECT_FALSE(storage.GetFrame8(kFirstFrameId + 1));
 }
 
 }  // namespace cast
 }  // namespace media