This macro is identical to NS_INTERFACE_MAP_END and encourages the
reader to think that there's something extra-special threadsafe about QI
implementations that use the macro, when in reality there's nothing of
the sort.
This patch will merge windows printingui implementation to common code.
Primary differences are:
* Use nsCOMPtr on nsPIDOMWindowOuter.
* Return NS_ERROR_FAILURE if nsPrintingPromptService doesn't have the
nsPrintProgress member when calling ShowProgress().
This is the unexpected case.
Original windows implementation has following difference, but this patch will
not copy it:
* Windows has own NS_IMPL_ADDREF / NS_IMPL_RELEASE implementation, however this
implementation isn't different from XPCOM implementation. Bug 156318
doesn't show this reason.
* Windows implementation lacks some function parameter checks.
But unixshared code covers these checks.
* Windows implementation doesn't have the nsIPrintSettings member into
nsPrintProgress, but this is necessary in order to make printing cancelable.
MozReview-Commit-ID: 8ja40rAaXBo
This patch will copy printingui implementation from unixshared in order to merge
other platform implementation.
This unixshared implementation has much common code hence using unixshared code
is reasonable for merging.
MozReview-Commit-ID: 4VManmNcbdc
