Revert "Revert "TaskManager bench""

This reverts commit 9640477e3cc075b0f303e817a3ebcc72d7bc878b.

Change-Id: I3aa8f2830b43b9c7b211c5792a311d0bc698c51a
diff --git a/libs/hwui/thread/TaskManager.h b/libs/hwui/thread/TaskManager.h
index d0eb304..e4808f7 100644
--- a/libs/hwui/thread/TaskManager.h
+++ b/libs/hwui/thread/TaskManager.h
@@ -80,7 +80,7 @@
     public:
         WorkerThread(const String8 name): mSignal(Condition::WAKE_UP_ONE), mName(name) { }
 
-        bool addTask(TaskWrapper task);
+        bool addTask(const TaskWrapper& task);
         size_t getTaskCount() const;
         void exit();