Remove DISABLED_ON_ macros.

webrtc/voice_engine/test/auto_test/standard/rtp_rtcp_test.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 83 matching lines @@
 
   // We need to sleep a bit here for the name to propagate. For instance,
   // 200 milliseconds is not enough, so we'll go with one second here.
   Sleep(1000);
 
   char char_buffer[256];
   voe_rtp_rtcp_->GetRemoteRTCP_CNAME(channel_, char_buffer);
   EXPECT_STREQ(RTCP_CNAME, char_buffer);
 }
 
-// Flakily hangs on Linux. code.google.com/p/webrtc/issues/detail?id=2178.
-TEST_F(RtpRtcpTest, DISABLED_ON_LINUX(SSRCPropagatesCorrectly)) {
+TEST_F(RtpRtcpTest, SSRCPropagatesCorrectly) {
   unsigned int local_ssrc = 1234;
   EXPECT_EQ(0, voe_base_->StopSend(channel_));
   EXPECT_EQ(0, voe_rtp_rtcp_->SetLocalSSRC(channel_, local_ssrc));
   EXPECT_EQ(0, voe_base_->StartSend(channel_));
 
   Sleep(1000);
 
   unsigned int ssrc;
   EXPECT_EQ(0, voe_rtp_rtcp_->GetLocalSSRC(channel_, ssrc));
   EXPECT_EQ(local_ssrc, ssrc);
 
   EXPECT_EQ(0, voe_rtp_rtcp_->GetRemoteSSRC(channel_, ssrc));
   EXPECT_EQ(local_ssrc, ssrc);
 }