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

runtime/vm/debuginfo.h

 // 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.
 
 #ifndef VM_DEBUGINFO_H_
 #define VM_DEBUGINFO_H_
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/globals.h"
@@ skipping 32 matching lines @@
     // Append an element.
     void Add(const uint8_t value) {
       Resize(size() + 1);
       data_[size() - 1] = value;
     }
 
    private:
     void Resize(int new_size) {
       if (new_size > capacity_) {
         int new_capacity = Utils::RoundUpToPowerOfTwo(new_size);
-        uint8_t* new_data =
-            reinterpret_cast<uint8_t*>(realloc(data_, new_capacity));
+        uint8_t* new_data = Utils::Realloc(data_, capacity_, new_capacity);
         ASSERT(new_data != NULL);
         data_ = new_data;
         capacity_ = new_capacity;
       }
       size_ = new_size;
     }
 
     int size_;
     int capacity_;
     uint8_t* data_;
@@ skipping 28 matching lines @@
  private:
   void* handle_;
   DebugInfo();
 
   DISALLOW_COPY_AND_ASSIGN(DebugInfo);
 };
 
 }  // namespace dart
 
 #endif  // VM_DEBUGINFO_H_