Bug 1269036 - Also destroy TabParent properly in case of mozbrowser. r=smaug, a=lizzard

MozReview-Commit-ID: Co0HL40b4q7

--HG--
extra : transplant_source : %5DG%FE%D3%D6%89%7Eo%8F%E2%85%0C%92%D4-T%BA%11%C5%1D

dom/ipc/TabParent.cpp

@@ -2741,6 +2741,9 @@ TabParent::RecvBrowserFrameOpenWindow(PBrowserParent* aOpener,
                                         this, aRenderFrame, aURL, aName, aFeatures,
                                         aTextureFactoryIdentifier, aLayersId);
   *aOutWindowOpened = (opened == BrowserElementParent::OPEN_WINDOW_ADDED);
+  if (!*aOutWindowOpened) {
+    Destroy();
+  }
   return true;
 }