Disabled WindowTreeClientTest.EmbedFailsFromOtherConnection on win due to flakes.

components/mus/ws/window_tree_client_unittest.cc

Index: components/mus/ws/window_tree_client_unittest.cc
diff --git a/components/mus/ws/window_tree_client_unittest.cc b/components/mus/ws/window_tree_client_unittest.cc
index f1e157125817292f95253ad724c0eef49f6380eb..c2fe5932ffd2c62254d326d75bc22741651d60cd 100644
--- a/components/mus/ws/window_tree_client_unittest.cc
+++ b/components/mus/ws/window_tree_client_unittest.cc
@@ -1701,7 +1701,14 @@ TEST_F(WindowTreeClientTest, EmbedSupplyingWindowTreeClient) {
             SingleChangeToDescription(*client2.tracker()->changes()));
 }
 
-TEST_F(WindowTreeClientTest, EmbedFailsFromOtherConnection) {
+// Disabled due to flakes on win8_chromium_ng; see https://crbug.com/598925.
+#if defined(OS_WIN)
+#define MAYBE_EmbedFailsFromOtherConnection \
+    DISABLED_EmbedFailsFromOtherConnection
+#else
+#define MAYBE_EmbedFailsFromOtherConnection EmbedFailsFromOtherConnection
+#endif
+TEST_F(WindowTreeClientTest, MAYBE_EmbedFailsFromOtherConnection) {
   ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
 
   Id window_1_1 = BuildWindowId(connection_id_1(), 1);