Revert 8810 "- Add a SetPriority method to ThreadWrapper"
Seeing if this is causing roll issues.

> - Add a SetPriority method to ThreadWrapper
> - Remove 'priority' from CreateThread and related member variables from implementations
> - Make supplying a name for threads, non-optional
> 
> BUG=
> R=magjed@webrtc.org
> 
> Review URL: https://webrtc-codereview.appspot.com/44729004

TBR=tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/48609004

Cr-Commit-Position: refs/heads/master@{#8818}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8818 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/system_wrappers/source/thread_unittest.cc b/webrtc/system_wrappers/source/thread_unittest.cc
index 854f98b..f5de7d2 100644
--- a/webrtc/system_wrappers/source/thread_unittest.cc
+++ b/webrtc/system_wrappers/source/thread_unittest.cc
@@ -24,7 +24,7 @@
 
 TEST(ThreadTest, StartStop) {
   rtc::scoped_ptr<ThreadWrapper> thread = ThreadWrapper::CreateThread(
-      &NullRunFunction, nullptr, "ThreadTest");
+      &NullRunFunction, NULL);
   ASSERT_TRUE(thread->Start());
   EXPECT_TRUE(thread->Stop());
 }
@@ -40,7 +40,7 @@
 TEST(ThreadTest, RunFunctionIsCalled) {
   bool flag = false;
   rtc::scoped_ptr<ThreadWrapper> thread = ThreadWrapper::CreateThread(
-      &SetFlagRunFunction, &flag, "RunFunctionIsCalled");
+      &SetFlagRunFunction, &flag);
   ASSERT_TRUE(thread->Start());
 
   // At this point, the flag may be either true or false.