Use 'new' in all the snapshot reallocation functions instead of realloc.

runtime/vm/class_table.cc

 // Copyright (c) 2012, 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/class_table.h"
 #include "vm/flags.h"
 #include "vm/freelist.h"
 #include "vm/object.h"
 #include "vm/raw_object.h"
 #include "vm/visitor.h"
@@ skipping 43 matching lines @@
     cpp_vtable cls_vtable = cls.handle_vtable();
     cpp_vtable table_entry = Object::builtin_vtables_[index];
     ASSERT((table_entry == 0) || (table_entry == cls_vtable));
     if (table_entry == 0) {
       Object::builtin_vtables_[index] = cls_vtable;
     }
   } else {
     if (top_ == capacity_) {
       // Grow the capacity of the class table.
       intptr_t new_capacity = capacity_ + capacity_increment_;
-      RawClass** new_table = reinterpret_cast<RawClass**>(
-          realloc(table_, new_capacity * sizeof(RawClass*)));  // NOLINT
+      RawClass** new_table = Utils::Realloc(table_, capacity_, new_capacity);
+      ASSERT(new_capacity > capacity_);
       for (intptr_t i = capacity_; i < new_capacity; i++) {
         new_table[i] = NULL;
       }
       capacity_ = new_capacity;
       table_ = new_table;
     }
     ASSERT(top_ < capacity_);
     cls.set_id(top_);
     table_[top_] = cls.raw();
     top_++;  // Increment next index.
@@ skipping 14 matching lines @@
   for (intptr_t i = 1; i < top_; i++) {
     cls = At(i);
     if (cls.raw() != reinterpret_cast<RawClass*>(0)) {
       name = cls.Name();
       OS::Print("%"Pd": %s\n", i, name.ToCString());
     }
   }
 }
 
 }  // namespace dart