Reviewed by Alexey.
        
        - add emitUnaryOp, emitNullaryOp and emitUnaryOpNoDst; use them
        
        This removes some boilerplate code and also reduces the number of
        places that will need to be changed to do on-demand emit of
        loads (and thus support k operands).

        * VM/CodeGenerator.cpp:
        (KJS::CodeGenerator::emitUnaryOp):
        (KJS::CodeGenerator::emitNullaryOp):
        (KJS::CodeGenerator::emitUnaryOpNoDst):
        (KJS::CodeGenerator::emitPushScope):
        * VM/CodeGenerator.h:
        (KJS::CodeGenerator::emitNewObject):
        (KJS::CodeGenerator::emitNewArray):
        (KJS::CodeGenerator::emitNot):
        (KJS::CodeGenerator::emitBitNot):
        (KJS::CodeGenerator::emitToJSNumber):
        (KJS::CodeGenerator::emitNegate):
        (KJS::CodeGenerator::emitInstanceOf):
        (KJS::CodeGenerator::emitTypeOf):
        (KJS::CodeGenerator::emitIn):
        (KJS::CodeGenerator::emitReturn):
        (KJS::CodeGenerator::emitEnd):
        (KJS::CodeGenerator::emitGetPropertyNames):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@34576 268f45cc-cd09-0410-ab3c-d52691b4dbfc