Fix Win64 compilation.

src/type-info.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 319 matching lines @@
               TRBinaryOpIC::GENERIC) {
             continue;
           }
         } else if (kind == Code::COMPARE_IC) {
           if (target->compare_state() == CompareIC::GENERIC) continue;
         } else {
           if (kind == Code::CALL_IC && state == MONOMORPHIC &&
               target->check_type() != RECEIVER_MAP_CHECK) continue;
           if (state != MONOMORPHIC && state != MEGAMORPHIC) continue;
         }
-        code_positions->Add(info->pc() - code->instruction_start());
+        code_positions->Add(
+            static_cast<int>(info->pc() - code->instruction_start()));
         source_positions->Add(position);
       }
     } else {
       ASSERT(RelocInfo::IsPosition(mode));
-      position = info->data();
+      position = static_cast<int>(info->data());
     }
   }
 }
 
 } }  // namespace v8::internal