Disable flaky TestCleanUpCacheEntries on Linux

chrome/browser/media/router/discovery/dial/device_description_service_unittest.cc

Index: chrome/browser/media/router/discovery/dial/device_description_service_unittest.cc
diff --git a/chrome/browser/media/router/discovery/dial/device_description_service_unittest.cc b/chrome/browser/media/router/discovery/dial/device_description_service_unittest.cc
index b58a67dab321abf07cdb5d7475500fa690fccacf..e6c186b3591b977655d9ed290b8d3d3f7807324e 100644
--- a/chrome/browser/media/router/discovery/dial/device_description_service_unittest.cc
+++ b/chrome/browser/media/router/discovery/dial/device_description_service_unittest.cc
@@ -247,7 +247,13 @@ TEST_F(DeviceDescriptionServiceTest,
                                                               "");
 }
 
-TEST_F(DeviceDescriptionServiceTest, TestCleanUpCacheEntries) {
+#if defined(OS_LINUX)
+#define MAYBE_TestCleanUpCacheEntries DISABLED_TestCleanUpCacheEntries
+#else
+#define MAYBE_TestCleanUpCacheEntries TestCleanUpCacheEntries
+#endif
+
+TEST_F(DeviceDescriptionServiceTest, MAYBE_TestCleanUpCacheEntries) {
   DialDeviceData device_data_1 = CreateDialDeviceData(1);
   DialDeviceData device_data_2 = CreateDialDeviceData(2);
   DialDeviceData device_data_3 = CreateDialDeviceData(3);