Bug 1432651 p1 - Pass RemotePrintJobChild through to the places where it's needed. r=emilio

Given how nsIPrintSettings is passed around, stored and copied all over the
place, it's very hard to reason about where and when a RemotePrintJobChild is
needed or valid. This patch avoids all that by explicitly passing a
RemotePrintJobChild when it's needed.

Another reason to make this change is because RemotePrintJobChild really does
not belong on nsIPrintSettings. That interface is supposed to represent a
collection of settings for laying out the document that is to be printed.

Differential Revision: https://phabricator.services.mozilla.com/D146380

dom/base/nsGlobalWindowOuter.cpp

@@ -272,6 +272,7 @@ using namespace mozilla::dom::ipc;
 using mozilla::BasePrincipal;
 using mozilla::OriginAttributes;
 using mozilla::TimeStamp;
+using mozilla::layout::RemotePrintJobChild;
 
 #define FORWARD_TO_INNER(method, args, err_rval)       \
   PR_BEGIN_MACRO                                       \
@@ -5139,7 +5140,7 @@ void nsGlobalWindowOuter::PrintOuter(ErrorResult& aError) {
   });
 
   const bool forPreview = !StaticPrefs::print_always_print_silent();
-  Print(nullptr, nullptr, nullptr, IsPreview(forPreview),
+  Print(nullptr, nullptr, nullptr, nullptr, IsPreview(forPreview),
         IsForWindowDotPrint::Yes, nullptr, aError);
 #endif
 }
@@ -5159,9 +5160,9 @@ class MOZ_RAII AutoModalState {
 };
 
 Nullable<WindowProxyHolder> nsGlobalWindowOuter::Print(
-    nsIPrintSettings* aPrintSettings, nsIWebProgressListener* aListener,
-    nsIDocShell* aDocShellToCloneInto, IsPreview aIsPreview,
-    IsForWindowDotPrint aForWindowDotPrint,
+    nsIPrintSettings* aPrintSettings, RemotePrintJobChild* aRemotePrintJob,
+    nsIWebProgressListener* aListener, nsIDocShell* aDocShellToCloneInto,
+    IsPreview aIsPreview, IsForWindowDotPrint aForWindowDotPrint,
     PrintPreviewResolver&& aPrintPreviewCallback, ErrorResult& aError) {
 #ifdef NS_PRINTING
   nsCOMPtr<nsIPrintSettingsService> printSettingsService =
@@ -5318,7 +5319,7 @@ Nullable<WindowProxyHolder> nsGlobalWindowOuter::Print(
       }
     } else {
       // Historically we've eaten this error.
-      webBrowserPrint->Print(ps, aListener);
+      webBrowserPrint->Print(ps, aRemotePrintJob, aListener);
     }
   }