Fix PropertyConverter test leak.

ui/aura/mus/property_converter_unittest.cc

Index: ui/aura/mus/property_converter_unittest.cc
diff --git a/ui/aura/mus/property_converter_unittest.cc b/ui/aura/mus/property_converter_unittest.cc
index d64a88b78c4647234e34d84aa1e25e29d990d62e..f1f1358fcb2d239bfdcbf0780a371b25bdb8b7b1 100644
--- a/ui/aura/mus/property_converter_unittest.cc
+++ b/ui/aura/mus/property_converter_unittest.cc
@@ -37,8 +37,8 @@ DEFINE_WINDOW_PROPERTY_KEY(int16_t, kTestPropertyKey6, 0);
 DEFINE_WINDOW_PROPERTY_KEY(int32_t, kTestPropertyKey7, 0);
 DEFINE_WINDOW_PROPERTY_KEY(int64_t, kTestPropertyKey8, 0);
 
-DEFINE_WINDOW_PROPERTY_KEY(gfx::Rect*, kTestRectPropertyKey, nullptr);
-DEFINE_WINDOW_PROPERTY_KEY(std::string*, kTestStringPropertyKey, nullptr);
+DEFINE_OWNED_WINDOW_PROPERTY_KEY(gfx::Rect, kTestRectPropertyKey, nullptr);
+DEFINE_OWNED_WINDOW_PROPERTY_KEY(std::string, kTestStringPropertyKey, nullptr);
 
 const char kTestPropertyServerKey0[] = "test-property-server0";
 const char kTestPropertyServerKey1[] = "test-property-server1";