Fixes for re-enabling more MSVC level 4 warnings: net/quic/ edition

net/quic/crypto/strike_register.cc

 // Copyright (c) 2013 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/crypto/strike_register.h"
 
 #include "base/logging.h"
 
 using std::pair;
 using std::set;
 using std::vector;
 
 namespace net {
 
 // static
 const uint32 StrikeRegister::kExternalNodeSize = 24;
 // static
-const uint32 StrikeRegister::kNil = (1 << 31) | 1;
+const uint32 StrikeRegister::kNil = (1u << 31) | 1;
 // static
 const uint32 StrikeRegister::kExternalFlag = 1 << 23;
 
 // InternalNode represents a non-leaf node in the critbit tree. See the comment
 // in the .h file for details.
 class StrikeRegister::InternalNode {
  public:
   void SetChild(unsigned direction, uint32 child) {
     data_[direction] = (data_[direction] & 0xff) | (child << 8);
   }
@@ skipping 426 matching lines @@
       CHECK_EQ(free_internal_nodes.count(inter), 0u);
       CHECK_EQ(used_internal_nodes->count(inter), 0u);
       used_internal_nodes->insert(inter);
       ValidateTree(inter, bit, bits, free_internal_nodes, free_external_nodes,
                    used_internal_nodes, used_external_nodes);
     }
   }
 }
 
 }  // namespace net