WaE: format string is not a string literal (potentially insecure)

Change-Id: I1f67fca5b66c41d633924ffbf763db03756c8ca7
WaE: unused variable 'aRefreshRect'

Change-Id: Ib327646572890b13f7049d2ba106c465d7c855f7
WaE: unused variable 'aRet'

Change-Id: Ic998a1eeddd89f45e12e4036dcbc21be534830ce