Fix machine_model behaviors in gpu blacklist.

gpu/config/gpu_control_list_machine_model_info_unittest.cc

Index: gpu/config/gpu_control_list_machine_model_info_unittest.cc
diff --git a/gpu/config/gpu_control_list_machine_model_info_unittest.cc b/gpu/config/gpu_control_list_machine_model_info_unittest.cc
index 9c681a9264f8609aeb614a323847e9e2595ad404..4fa7b80d360c5024e31caba9cc470b6dfa088d6c 100644
--- a/gpu/config/gpu_control_list_machine_model_info_unittest.cc
+++ b/gpu/config/gpu_control_list_machine_model_info_unittest.cc
@@ -48,10 +48,17 @@ TEST_F(MachineModelInfoTest, ValidModelInfo) {
 
 TEST_F(MachineModelInfoTest, ModelComparison) {
   MachineModelInfo info("=", "model_a", ">", "3.4", std::string());
+  EXPECT_TRUE(info.IsValid());
   EXPECT_TRUE(info.Contains("model_a", "4"));
   EXPECT_FALSE(info.Contains("model_b", "4"));
   EXPECT_FALSE(info.Contains("model_a", "3.2"));
 }
 
+TEST_F(MachineModelInfoTest, ModelNameNoVersion) {
+  MachineModelInfo info("=", "model_a", "any", std::string(), std::string());
+  EXPECT_TRUE(info.IsValid());
+  EXPECT_TRUE(info.Contains("model_a", std::string()));
+}
+
 }  // namespace gpu