Bug 1019191 part 17. Make some of the remaining quickstub unwrap methods static. r=peterv

Note that we know that we always call UnwrapArg with an object, so
xpc_qsUnwrapArgImpl knows v is always an object.

js/xpconnect/src/XPCQuickStubs.cpp

@@ -48,7 +48,7 @@ getNativeFromWrapper(JSContext *cx,
 }
 
 
-nsresult
+static nsresult
 getWrapper(JSContext *cx,
            JSObject *obj,
            XPCWrappedNative **wrapper,
@@ -106,7 +106,7 @@ getWrapper(JSContext *cx,
     return NS_OK;
 }
 
-nsresult
+static nsresult
 castNative(JSContext *cx,
            XPCWrappedNative *wrapper,
            JSObject *curArg,
@@ -147,18 +147,13 @@ xpc_qsUnwrapArgImpl(JSContext *cx,
                     nsISupports **ppArgRef,
                     MutableHandleValue vp)
 {
-    nsresult rv;
-    RootedObject src(cx, xpc_qsUnwrapObj(v, ppArgRef, &rv));
-    if (!src) {
-        *ppArg = nullptr;
-
-        return rv;
-    }
+    MOZ_ASSERT(v.isObject());
+    RootedObject src(cx, &v.toObject());
 
     XPCWrappedNative *wrapper;
     XPCWrappedNativeTearOff *tearoff;
     JSObject *obj2;
-    rv = getWrapper(cx, src, &wrapper, &obj2, &tearoff);
+    nsresult rv = getWrapper(cx, src, &wrapper, &obj2, &tearoff);
     NS_ENSURE_SUCCESS(rv, rv);
 
     if (wrapper || obj2) {

js/xpconnect/src/XPCQuickStubs.h

@@ -11,41 +11,6 @@
 
 /* XPCQuickStubs.h - Support functions used only by Web IDL bindings, for now. */
 
-nsresult
-getWrapper(JSContext *cx,
-           JSObject *obj,
-           XPCWrappedNative **wrapper,
-           JSObject **cur,
-           XPCWrappedNativeTearOff **tearoff);
-
-nsresult
-castNative(JSContext *cx,
-           XPCWrappedNative *wrapper,
-           JSObject *cur,
-           XPCWrappedNativeTearOff *tearoff,
-           const nsIID &iid,
-           void **ppThis,
-           nsISupports **ppThisRef,
-           JS::MutableHandleValue vp);
-
-MOZ_ALWAYS_INLINE JSObject*
-xpc_qsUnwrapObj(jsval v, nsISupports **ppArgRef, nsresult *rv)
-{
-    *rv = NS_OK;
-    if (v.isObject()) {
-        return &v.toObject();
-    }
-
-    if (!v.isNullOrUndefined()) {
-        *rv = ((v.isInt32() && v.toInt32() == 0)
-               ? NS_ERROR_XPC_BAD_CONVERT_JS_ZERO_ISNOT_NULL
-               : NS_ERROR_XPC_BAD_CONVERT_JS);
-    }
-
-    *ppArgRef = nullptr;
-    return nullptr;
-}
-
 nsresult
 xpc_qsUnwrapArgImpl(JSContext *cx, JS::HandleValue v, const nsIID &iid, void **ppArg,
                     nsISupports **ppArgRef, JS::MutableHandleValue vp);