diff --git a/dom/ipc/TabChild.cpp b/dom/ipc/TabChild.cpp
index c0d31bd70262..f4ee2f12a9f3 100644
--- a/dom/ipc/TabChild.cpp
+++ b/dom/ipc/TabChild.cpp
@@ -2492,7 +2492,6 @@ NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(TabChildGlobal)
   NS_INTERFACE_MAP_ENTRY(nsISyncMessageSender)
   NS_INTERFACE_MAP_ENTRY(nsIContentFrameMessageManager)
   NS_INTERFACE_MAP_ENTRY(nsIScriptObjectPrincipal)
-  NS_INTERFACE_MAP_ENTRY(nsIGlobalObject)
   NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(ContentFrameMessageManager)
 NS_INTERFACE_MAP_END_INHERITING(nsDOMEventTargetHelper)
 
@@ -2557,20 +2556,10 @@ TabChildGlobal::GetJSContextForEventHandlers()
   return nsContentUtils::GetSafeJSContext();
 }
 
-nsIPrincipal*
+nsIPrincipal* 
 TabChildGlobal::GetPrincipal()
 {
   if (!mTabChild)
     return nullptr;
   return mTabChild->GetPrincipal();
 }
-
-JSObject*
-TabChildGlobal::GetGlobalJSObject()
-{
-  NS_ENSURE_TRUE(mTabChild, nullptr);
-  nsCOMPtr<nsIXPConnectJSObjectHolder> ref = mTabChild->GetGlobal();
-  NS_ENSURE_TRUE(ref, nullptr);
-  return ref->GetJSObject();
-}
-
diff --git a/dom/ipc/TabChild.h b/dom/ipc/TabChild.h
index ab77432bcde9..cf42622b8987 100644
--- a/dom/ipc/TabChild.h
+++ b/dom/ipc/TabChild.h
@@ -51,8 +51,7 @@ class ClonedMessageData;
 
 class TabChildGlobal : public nsDOMEventTargetHelper,
                        public nsIContentFrameMessageManager,
-                       public nsIScriptObjectPrincipal,
-                       public nsIGlobalObject
+                       public nsIScriptObjectPrincipal
 {
 public:
   TabChildGlobal(TabChild* aTabChild);
@@ -128,7 +127,6 @@ public:
 
   virtual JSContext* GetJSContextForEventHandlers() MOZ_OVERRIDE;
   virtual nsIPrincipal* GetPrincipal() MOZ_OVERRIDE;
-  virtual JSObject* GetGlobalJSObject() MOZ_OVERRIDE;
 
   nsCOMPtr<nsIContentFrameMessageManager> mMessageManager;
   TabChild* mTabChild;