Revert of Disable flaky TextureLayerChangeInvisibleMailboxTest.RunMultiThread_DelegatingRenderer

cc/test/layer_tree_test.h

Index: cc/test/layer_tree_test.h
diff --git a/cc/test/layer_tree_test.h b/cc/test/layer_tree_test.h
index b34b103755d5b743f4cff24d60d71e158b7a9af3..3388aba8c892a8f396a57c62e85d6dca994bd941 100644
--- a/cc/test/layer_tree_test.h
+++ b/cc/test/layer_tree_test.h
@@ -211,11 +211,10 @@
   }                                                               \
   class SingleThreadDelegatingImplNeedsSemicolon##TEST_FIXTURE_NAME {}
 
-// This test is flaky, so marked with DISABLED (https://crbug.com/702329)
-#define MULTI_THREAD_TEST_F(TEST_FIXTURE_NAME)                            \
-  TEST_F(TEST_FIXTURE_NAME, DISABLED_RunMultiThread_DelegatingRenderer) { \
-    RunTest(CompositorMode::THREADED);                                    \
-  }                                                                       \
+#define MULTI_THREAD_TEST_F(TEST_FIXTURE_NAME)                   \
+  TEST_F(TEST_FIXTURE_NAME, RunMultiThread_DelegatingRenderer) { \
+    RunTest(CompositorMode::THREADED);                           \
+  }                                                              \
   class MultiThreadDelegatingImplNeedsSemicolon##TEST_FIXTURE_NAME {}
 
 #define SINGLE_AND_MULTI_THREAD_TEST_F(TEST_FIXTURE_NAME) \