Remove TSan v2 disabled test in condition_variable_unittest.cc

When we rolled our chromium_revision 226126:228675 in r4966
we picked up Clang r191856, which fixes the problem we've
seen earlier in condition_variable_unittest.cc.
Because of this, I'm now re-enabling this test.

TEST=trybots passing
BUG=2259
R=hta@webrtc.org, perkj@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2404004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4971 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/system_wrappers/source/condition_variable_unittest.cc

@@ -175,10 +175,6 @@ class CondVarTest : public ::testing::Test {
   ThreadWrapper* thread_;
 };
 
-// Disable for TSan v2, see
-// https://code.google.com/p/webrtc/issues/detail?id=2259 for details.
-#if !defined(THREAD_SANITIZER)
-
 // The SetUp and TearDown functions use condition variables.
 // This test verifies those pieces in isolation.
 TEST_F(CondVarTest, InitFunctionsWork) {
@@ -195,8 +191,6 @@ TEST_F(CondVarTest, PassBatonMultipleTimes) {
   EXPECT_EQ(2 * kNumberOfRounds, baton_.PassCount());
 }
 
-#endif // if !defined(THREAD_SANITIZER)
-
 }  // anonymous namespace
 
 }  // namespace webrtc