Reduces output & memory usage of compiler by using prototype chain for inherits

Reduces output & memory usage of compiler by using prototype chain for inherits

The setting of $inherits for superclasses in each class is redundant,
since this property is set on the prototype.   This reduces the JS output
of co19 test LangSpecTest/13_Types/13_4_Interface_Types/A11/t01 from
43 MB to 1.6 MB.

http://code.google.com/p/dart/issues/detail?id=611

Committed: https://code.google.com/p/dart/source/detail?r=1868

[codefu, 2011-11-28 17:01:59]

On 2011/11/28 16:56:32, zundel wrote:

LGTM

[mmendez, 2011-11-28 18:13:09]

lgtm