7193657: provide internal ArrayUtils class to simplify common usage of arrays in javac Reviewed-by: mcimadamore, jjg Contributed-by: vicenterz@yahoo.es

7177306: Regression: unchecked method call does not erase return type Summary: Spurious extra call to Attr.checkMethod when method call is unchecked Reviewed-by: jjg, dlsmith

7175433: Inference cleanup: add helper class to handle inference variables Summary: Add class to handle inference variables instantiation and associated info Reviewed-by: jjg, dlsmith