Disable TestTCPSocketRTT on chromeos (take 2).

crrev.com/c/1179227 didn't actually disable it. Looks like we messed up
the conditional a little.

Bug: 875104
Change-Id: Ide2caab7969f2aa33f6c16e7b73e2f389273f9fe
Reviewed-on: https://chromium-review.googlesource.com/1189033Reviewed-by: Asanka Herath <asanka@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#586347}

net/nqe/network_quality_estimator_unittest.cc

@@ -1905,8 +1905,8 @@ TEST_F(NetworkQualityEstimatorTest, TestGlobalSocketWatcherThrottle) {
 
 // TestTCPSocketRTT requires kernel support for tcp_info struct, and so it is
 // enabled only on certain platforms.
-#if defined(TCP_INFO) || defined(OS_LINUX) || defined(OS_ANDROID) || \
-    defined(OS_CHROMEOS)
+#if defined(TCP_INFO) || (defined(OS_LINUX) && !defined(OS_CHROMEOS)) || \
+    defined(OS_ANDROID)
 #define MAYBE_TestTCPSocketRTT TestTCPSocketRTT
 #else
 #define MAYBE_TestTCPSocketRTT DISABLED_TestTCPSocketRTT