VM: Const-correctness fixes.

runtime/bin/socket.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef BIN_SOCKET_H_
 #define BIN_SOCKET_H_
 
 #include <map>
 
 #include "platform/globals.h"
@@ skipping 127 matching lines @@
     } else {
       return ntohs(addr.in6.sin6_port);
     }
   }
 
   static Dart_Handle ToTypedData(const RawAddr& addr) {
     int len = GetInAddrLength(addr);
     Dart_Handle result = Dart_NewTypedData(Dart_TypedData_kUint8, len);
     if (Dart_IsError(result)) Dart_PropagateError(result);
     Dart_Handle err;
-    RawAddr& raw = const_cast<RawAddr&>(addr);
     if (addr.addr.sa_family == AF_INET6) {
       err = Dart_ListSetAsBytes(
-          result, 0, reinterpret_cast<uint8_t*>(&raw.in6.sin6_addr), len);
+          result, 0,
+          reinterpret_cast<const uint8_t*>(&addr.in6.sin6_addr), len);
     } else {
       err = Dart_ListSetAsBytes(
-          result, 0, reinterpret_cast<uint8_t*>(&raw.in.sin_addr), len);
+          result, 0, reinterpret_cast<const uint8_t*>(&addr.in.sin_addr), len);
     }
     if (Dart_IsError(err)) Dart_PropagateError(err);
     return result;
   }
 
   static CObjectUint8Array* ToCObject(const RawAddr& addr) {
     int in_addr_len = SocketAddress::GetInAddrLength(addr);
-    void* in_addr;
-    RawAddr& raw = const_cast<RawAddr&>(addr);
+    const void* in_addr;
     CObjectUint8Array* data =
         new CObjectUint8Array(CObject::NewUint8Array(in_addr_len));
     if (addr.addr.sa_family == AF_INET6) {
-      in_addr = reinterpret_cast<void*>(&raw.in6.sin6_addr);
+      in_addr = reinterpret_cast<const void*>(&addr.in6.sin6_addr);
     } else {
-      in_addr = reinterpret_cast<void*>(&raw.in.sin_addr);
+      in_addr = reinterpret_cast<const void*>(&addr.in.sin_addr);
     }
     memmove(data->Buffer(), in_addr, in_addr_len);
     return data;
   }
 
  private:
   char as_string_[INET6_ADDRSTRLEN];
   RawAddr addr_;
 
   DISALLOW_COPY_AND_ASSIGN(SocketAddress);
@@ skipping 236 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ListeningSocketRegistry);
 };
 
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // BIN_SOCKET_H_