Reviewed by Oliver Hunt.
        
        A little cleanup in the RegisterFile code.
        
        Moved large inline functions out of the class declaration, to make it
        more readable.
        
        Switched over to using the roundUpAllocationSize function to avoid
        duplicate code and subtle bugs.
        
        Renamed m_maxCommitted to m_commitEnd, to match m_end.
        
        Renamed allocationSize to commitSize because it's the chunk size for
        committing memory, not allocating memory.
        
        SunSpider reports no change.

        * interpreter/RegisterFile.h:
        (JSC::RegisterFile::RegisterFile):
        (JSC::RegisterFile::shrink):
        (JSC::RegisterFile::grow):
        * jit/ExecutableAllocator.h:
        (JSC::roundUpAllocationSize):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@41872 268f45cc-cd09-0410-ab3c-d52691b4dbfc