Bug 1456911 - Prelude: Fix unified build breakage exposed by the next patch. r=froydnj

This directory has a number of places where files unintentionally depend
on `#include`s and `using` directives and forward declarations in other
files in the same unified build group.  Adding a file shifts the group
boundaries and exposes some of those bugs; this patch fixes them (but
there are others).

MozReview-Commit-ID: AqAOdnXniTn

--HG--
extra : rebase_source : ed6030785d9cc5cc0ea1a46707725472de1c0fa9

ipc/glue/IPCStreamSource.cpp

@@ -5,6 +5,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "IPCStreamSource.h"
+#include "BackgroundParent.h" // for AssertIsOnBackgroundThread
 #include "mozilla/webrender/WebRenderTypes.h"
 #include "nsIAsyncInputStream.h"
 #include "nsICancelableRunnable.h"

ipc/glue/IPCStreamSource.h

@@ -28,6 +28,8 @@ namespace ipc {
 
 class PBackgroundChild;
 class PBackgroundParent;
+class PChildToParentStreamChild;
+class PParentToChildStreamParent;
 
 // The IPCStream IPC actor is designed to push an nsIInputStream from child to
 // parent or parent to child incrementally.  This is mainly needed for streams

modules/libjar/nsJARURI.h

@@ -111,7 +111,7 @@ private:
     nsresult SetRef(const nsACString &input);
     nsresult SetFilePath(const nsACString &input);
     nsresult SetQuery(const nsACString &input);
-    nsresult SetQueryWithEncoding(const nsACString &input, const Encoding* encoding);
+    nsresult SetQueryWithEncoding(const nsACString &input, const mozilla::Encoding* encoding);
     bool Deserialize(const mozilla::ipc::URIParams&);
     nsresult ReadPrivate(nsIObjectInputStream *aStream);