Bug 1331804 - Give runnable names to some generic dispatch sites (r=ehsan)

MozReview-Commit-ID: 83IL5zcor1W

dom/workers/WorkerPrivate.cpp

@@ -4747,7 +4747,11 @@ nsresult
 WorkerPrivate::DispatchToMainThread(already_AddRefed<nsIRunnable> aRunnable,
                                     uint32_t aFlags)
 {
-  return mMainThreadEventTarget->Dispatch(Move(aRunnable), aFlags);
+  nsCOMPtr<nsIRunnable> runnable = aRunnable;
+  if (nsCOMPtr<nsINamed> named = do_QueryInterface(runnable)) {
+    named->SetName("WorkerRunnable");
+  }
+  return mMainThreadEventTarget->Dispatch(runnable.forget(), aFlags);
 }
 
 void

xpcom/threads/nsTimerImpl.cpp

@@ -663,24 +663,28 @@ nsTimerImpl::GetName(nsACString& aName)
         aName.Assign(buf);
       } else {
         MOZ_ASSERT(mName.is<NameNothing>());
-        aName.Truncate();
+        aName.AssignLiteral("Anonymous callback timer");
       }
       break;
 
     case CallbackType::Interface:
       if (nsCOMPtr<nsINamed> named = do_QueryInterface(mCallback.i)) {
         named->GetName(aName);
+      } else {
+        aName.AssignLiteral("Anonymous interface timer");
       }
       break;
 
     case CallbackType::Observer:
       if (nsCOMPtr<nsINamed> named = do_QueryInterface(mCallback.o)) {
         named->GetName(aName);
+      } else {
+        aName.AssignLiteral("Anonymous observer timer");
       }
       break;
 
     case CallbackType::Unknown:
-      aName.Truncate();
+      aName.AssignLiteral("Anonymous timer");
       break;
   }
 }