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Emilio Cobos Álvarez authored
It's not clear to me why specializing nsCOMPtr<nsISupports> is
particularly useful, and this removes a lot of code, bringing us closer
to unifying nsCOMPtr and RefPtr.

The changes in other places are needed because we used to allow
nsCOMPtr<nsISupports> to implicitly coerce to nsISupports even for
rvalue references.

     0:47.88 /home/emilio/src/moz/gecko-4/netwerk/protocol/http/nsHttpActivityDistributor.cpp:121:11: error: conversion function from 'nsCOMPtr<nsISupports>' to 'nsISupports *' invokes a deleted function
     0:47.88           nsCOMPtr<nsISupports>(do_QueryObject(channel)), aActivityType,
     0:47.88           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     0:47.88 /home/emilio/src/moz/gecko-4/obj-debug/dist/include/nsCOMPtr.h:764:3: note: 'operator nsISupports *' has been explicitly marked deleted here
     0:47.88   operator T*() const&& = delete;
     0:47.88   ^
     0:47.88 /home/emilio/src/moz/gecko-4/netwerk/protocol/http/nsHttpActivityDistributor.cpp:29:57: note: passing argument to parameter 'aHttpChannel' here
     0:47.88 nsHttpActivityDistributor::ObserveActivity(nsISupports* aHttpChannel,
     0:47.88                                                         ^

Which is not allowed for a good reason, generally.

Differential Revision: https://phabricator.services.mozilla.com/D179124
c2f5a4ac
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