Fixing memory leak error in test.

BUG=
TEST=

Review URL: https://webrtc-codereview.appspot.com/571013

git-svn-id: http://webrtc.googlecode.com/svn/trunk@2272 4adac7df-926f-26a2-2b94-8c16560cd09d

src/system_wrappers/source/thread_unittest.cc

@@ -69,6 +69,7 @@ TEST_F(ThreadTest, StartStop) {
   unsigned int id = 42;
   ASSERT_TRUE(thread->Start(id));
   EXPECT_TRUE(thread->Stop());
+  delete thread;
 }
 
 // Function that sets a boolean.
@@ -88,6 +89,7 @@ TEST_F(ThreadTest, RunFunctionIsCalled) {
   EXPECT_TRUE(thread->Stop());
   // We expect the thread to have run at least once.
   EXPECT_TRUE(flag);
+  delete thread;
 }
 
 }  // namespace webrtc