Bug 1261599 - null check SendPBrowserConstructor return in ContentParent to avoid crashes on content process shutdown. r=smaug

MozReview-Commit-ID: 4LqDIeN9XRq

--HG--
extra : rebase_source : ff6edb2b80ac4e29374092d2637fc91886afec0d

dom/ipc/ContentParent.cpp

@@ -1201,9 +1201,11 @@ ContentParent::CreateBrowserOrApp(const TabContext& aContext,
         constructorSender->IsForApp(),
         constructorSender->IsForBrowser());
 
-      RefPtr<TabParent> constructedTabParent = TabParent::GetFrom(browser);
-      constructedTabParent->SetOwnerElement(aFrameElement);
-      return constructedTabParent;
+      if (browser) {
+        RefPtr<TabParent> constructedTabParent = TabParent::GetFrom(browser);
+        constructedTabParent->SetOwnerElement(aFrameElement);
+        return constructedTabParent;
+      }
     }
     return nullptr;
   }