Remove now unused CalculateExactRetainedSize function & сo.

include/v8-profiler.h

 // 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 266 matching lines @@
   uint64_t GetId() const;
 
   /** Returns node's own size, in bytes. */
   int GetSelfSize() const;
 
   /**
    * Returns node's retained size, in bytes. That is, self + sizes of
    * the objects that are reachable only from this object. In other
    * words, the size of memory that will be reclaimed having this node
    * collected.
-   *
-   * Exact retained size calculation has O(N) (number of nodes)
-   * computational complexity, while approximate has O(1). It is
-   * assumed that initially heap profiling tools provide approximate
-   * sizes for all nodes, and then exact sizes are calculated for the
-   * most 'interesting' nodes.
    */
-  int GetRetainedSize(bool exact) const;
+  int GetRetainedSize() const;
 
   /** Returns child nodes count of the node. */
   int GetChildrenCount() const;
 
   /** Retrieves a child by index. */
   const HeapGraphEdge* GetChild(int index) const;
 
   /** Returns retainer nodes count of the node. */
   int GetRetainersCount() const;
 
@@ skipping 208 matching lines @@
 };
 
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 
 
 #endif  // V8_V8_PROFILER_H_