[vm] Rename *MintOp to *Int64Op to emphasis that they operate on unboxed values.

runtime/vm/deopt_instructions.cc

 // 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.
 
 #include "vm/deopt_instructions.h"
 
 #include "vm/assembler.h"
 #include "vm/code_patcher.h"
 #include "vm/compiler.h"
 #include "vm/disassembler.h"
@@ skipping 1077 matching lines @@
     Representation rep =
         (value == NULL) ? kTagged : value->definition()->representation();
 #else
     Representation rep = value->definition()->representation();
 #endif
     switch (rep) {
       case kTagged:
         deopt_instr =
             new (zone()) DeoptWordInstr(ToCpuRegisterSource(source_loc));
         break;
-      case kUnboxedMint: {
+      case kUnboxedInt64: {
         if (source_loc.IsPairLocation()) {
           PairLocation* pair = source_loc.AsPairLocation();
           deopt_instr =
               new (zone()) DeoptMintPairInstr(ToCpuRegisterSource(pair->At(0)),
                                               ToCpuRegisterSource(pair->At(1)));
         } else {
           ASSERT(!source_loc.IsPairLocation());
           deopt_instr =
               new (zone()) DeoptMintInstr(ToCpuRegisterSource(source_loc));
         }
@@ skipping 315 matching lines @@
   GrowableArray<DeoptInstr*> unpacked;
   Unpack(deopt_table, packed, &unpacked);
   ASSERT(unpacked.length() == original.length());
   for (intptr_t i = 0; i < unpacked.length(); ++i) {
     ASSERT(unpacked[i]->Equals(*original[i]));
   }
   return true;
 }
 
 }  // namespace dart