Expose a lower bound of malloc'd memory via heap statistics

include/v8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 5168 matching lines @@
  */
 class V8_EXPORT HeapStatistics {
  public:
   HeapStatistics();
   size_t total_heap_size() { return total_heap_size_; }
   size_t total_heap_size_executable() { return total_heap_size_executable_; }
   size_t total_physical_size() { return total_physical_size_; }
   size_t total_available_size() { return total_available_size_; }
   size_t used_heap_size() { return used_heap_size_; }
   size_t heap_size_limit() { return heap_size_limit_; }
+  size_t malloced_memory() { return malloced_memory_; }
   size_t does_zap_garbage() { return does_zap_garbage_; }
 
  private:
   size_t total_heap_size_;
   size_t total_heap_size_executable_;
   size_t total_physical_size_;
   size_t total_available_size_;
   size_t used_heap_size_;
   size_t heap_size_limit_;
+  size_t malloced_memory_;
   bool does_zap_garbage_;
 
   friend class V8;
   friend class Isolate;
 };
 
 
 class V8_EXPORT HeapSpaceStatistics {
  public:
   HeapSpaceStatistics();
@@ skipping 3539 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_