diff --git a/dom/base/RemoteOuterWindowProxy.cpp b/dom/base/RemoteOuterWindowProxy.cpp
index 8beadad98ddc..4e6473d4431e 100644
--- a/dom/base/RemoteOuterWindowProxy.cpp
+++ b/dom/base/RemoteOuterWindowProxy.cpp
@@ -70,7 +70,7 @@ bool GetRemoteOuterWindowProxy(JSContext* aCx, BrowsingContext* aContext,
   return !!aRetVal;
 }
 
-static BrowsingContext* GetBrowsingContext(JSObject* aProxy) {
+BrowsingContext* GetBrowsingContext(JSObject* aProxy) {
   MOZ_ASSERT(IsRemoteObjectProxy(aProxy, prototypes::id::Window));
   return static_cast<BrowsingContext*>(
       RemoteObjectProxyBase::GetNative(aProxy));
diff --git a/dom/base/nsGlobalWindowOuter.cpp b/dom/base/nsGlobalWindowOuter.cpp
index 0c16381263e0..1b17a11c2db7 100644
--- a/dom/base/nsGlobalWindowOuter.cpp
+++ b/dom/base/nsGlobalWindowOuter.cpp
@@ -493,7 +493,6 @@ class nsOuterWindowProxy : public MaybeCrossOriginObject<js::Wrapper> {
 
   static const nsOuterWindowProxy singleton;
 
- protected:
   static nsGlobalWindowOuter* GetOuterWindow(JSObject* proxy) {
     nsGlobalWindowOuter* outerWindow =
         nsGlobalWindowOuter::FromSupports(static_cast<nsISupports*>(
@@ -501,6 +500,7 @@ class nsOuterWindowProxy : public MaybeCrossOriginObject<js::Wrapper> {
     return outerWindow;
   }
 
+ protected:
   // False return value means we threw an exception.  True return value
   // but false "found" means we didn't have a subframe at that index.
   bool GetSubframeWindow(JSContext* cx, JS::Handle<JSObject*> proxy,
diff --git a/dom/bindings/RemoteObjectProxy.h b/dom/bindings/RemoteObjectProxy.h
index 4b5ac9dd922a..b3782978cc21 100644
--- a/dom/bindings/RemoteObjectProxy.h
+++ b/dom/bindings/RemoteObjectProxy.h
@@ -15,6 +15,8 @@
 namespace mozilla {
 namespace dom {
 
+class BrowsingContext;
+
 /**
  * Base class for RemoteObjectProxy. Implements the pieces of the handler that
  * don't depend on properties/methods of the specific WebIDL interface that this
@@ -190,6 +192,12 @@ inline bool IsRemoteObjectProxy(JSObject* aObj) {
   return RemoteObjectProxyBase::IsRemoteObjectProxy(aObj);
 }
 
+/**
+ * Return the browsing context for this remote outer window proxy.
+ * Only call this function on remote outer window proxies.
+ */
+BrowsingContext* GetBrowsingContext(JSObject* aProxy);
+
 }  // namespace dom
 }  // namespace mozilla