8324147: Serial: Remove generation::compute_new_size

Reviewed-by: ehelin

src/hotspot/share/gc/serial/defNewGeneration.hpp

@@ -250,7 +250,7 @@ class DefNewGeneration: public Generation {
   void reset_scratch();
 
   // GC support
-  virtual void compute_new_size();
+  void compute_new_size();
 
   // Returns true if the collection is likely to be safely
   // completed. Even if this method returns true, a collection

src/hotspot/share/gc/serial/generation.hpp

@@ -248,11 +248,6 @@ class Generation: public CHeapObj<mtGC> {
   // generation since the last call to "save_marks".
   virtual bool no_allocs_since_save_marks() = 0;
 
-  // When an older generation has been collected, and perhaps resized,
-  // this method will be invoked on all younger generations (from older to
-  // younger), allowing them to resize themselves as appropriate.
-  virtual void compute_new_size() = 0;
-
   // Printing
   virtual const char* name() const = 0;
   virtual const char* short_name() const = 0;

src/hotspot/share/gc/serial/tenuredGeneration.hpp

@@ -81,7 +81,7 @@ class TenuredGeneration: public Generation {
 
   void compute_new_size_inner();
  public:
-  virtual void compute_new_size();
+  void compute_new_size();
 
   TenuredSpace* space() const { return _the_space; }