Remove now unused CalculateExactRetainedSize function & сo.

src/api.cc

 // Copyright 2012 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 5849 matching lines @@
 }
 
 
 int HeapGraphNode::GetSelfSize() const {
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapGraphNode::GetSelfSize");
   return ToInternal(this)->self_size();
 }
 
 
-int HeapGraphNode::GetRetainedSize(bool exact) const {
+int HeapGraphNode::GetRetainedSize() const {
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetRetainedSize");
-  return ToInternal(this)->RetainedSize(exact);
+  return ToInternal(this)->retained_size();
 }
 
 
 int HeapGraphNode::GetChildrenCount() const {
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetChildrenCount");
   return ToInternal(this)->children().length();
 }
 
 
@@ skipping 304 matching lines @@
 
 
 char* HandleScopeImplementer::Iterate(ObjectVisitor* v, char* storage) {
   HandleScopeImplementer* scope_implementer =
       reinterpret_cast<HandleScopeImplementer*>(storage);
   scope_implementer->IterateThis(v);
   return storage + ArchiveSpacePerThread();
 }
 
 } }  // namespace v8::internal