2013-04-23  Sharath Kamath  <s.kamath@samsung.com>

        Use [Optional=DefaultIsUndefined] where appropriated in WebCL idl's
        Issue #211

        Reviewed by Antonio.

        No new tests (OOPS!).

        * Modules/webcl/WebCLCommandQueue.h:
        (WebCLCommandQueue):
        * Modules/webcl/WebCLCommandQueue.idl:
        * Modules/webcl/WebCLContext.h:
        (WebCLContext):
        * Modules/webcl/WebCLContext.idl:
        * Modules/webcl/WebCLProgram.h:
        (WebCLProgram):
        * Modules/webcl/WebCLProgram.idl: