Change test for MaxExecutionTime to allow time 0, in

direct_session_with_tracking_alloc_test.
Change: 124970170

tensorflow/core/common_runtime/direct_session_with_tracking_alloc_test.cc

@@ -100,7 +100,7 @@ TEST(DirectSessionWithTrackingAllocTest, CostModelTest) {
       // Check the execution time. Since it's highly variable, we'll
       // use a large window: anything between 1 and 10000 microseconds is
       // considered ok.
-      EXPECT_LE(1, cm->MaxExecutionTime(node));
+      EXPECT_LE(0, cm->MaxExecutionTime(node));
       EXPECT_GE(10000, cm->MaxExecutionTime(node));
     }
     graph_cnt++;