Bug 1323100 - Stop double-registering the MediaStreamGraph thread with the profiler. r=froydnj

MozReview-Commit-ID: 7WxNLZpBWL4

--HG--
extra : rebase_source : ce8fe0481c8e3c3d3efd3d1c15480490943ee202

dom/media/GraphDriver.cpp

@@ -39,19 +39,6 @@ namespace mozilla {
 
 StaticRefPtr<nsIThreadPool> AsyncCubebTask::sThreadPool;
 
-struct AutoProfilerUnregisterThread
-{
-  // The empty ctor is used to silence a pre-4.8.0 GCC unused variable warning.
-  AutoProfilerUnregisterThread()
-  {
-  }
-
-  ~AutoProfilerUnregisterThread()
-  {
-    profiler_unregister_thread();
-  }
-};
-
 GraphDriver::GraphDriver(MediaStreamGraphImpl* aGraphImpl)
   : mIterationStart(0),
     mIterationEnd(0),
@@ -196,9 +183,7 @@ public:
   }
   NS_IMETHOD Run() override
   {
-    char aLocal;
     STREAM_LOG(LogLevel::Debug, ("Starting system thread"));
-    profiler_register_thread("MediaStreamGraph", &aLocal);
     LIFECYCLE_LOG("Starting a new system driver for graph %p\n",
                   mDriver->mGraphImpl);
 
@@ -316,8 +301,6 @@ SystemClockDriver::IsFallback()
 void
 ThreadedDriver::RunThread()
 {
-  AutoProfilerUnregisterThread autoUnregister;
-
   bool stillProcessing = true;
   while (stillProcessing) {
     mIterationStart = IterationEnd();