Mark single-argument inline constructors as 'explicit'.

src/property.h

Index: src/property.h
diff --git a/src/property.h b/src/property.h
index fa3916eb144825205559e5e8e691718749729897..ee95ca217a28b42b7916b3d36dceef2a2843a41c 100644
--- a/src/property.h
+++ b/src/property.h
@@ -185,6 +185,13 @@ class LookupResult BASE_EMBEDDED {
     number_ = number;
   }
 
+  void DescriptorResult(JSObject* holder, Smi* details, int number) {
+    lookup_type_ = DESCRIPTOR_TYPE;
+    holder_ = holder;
+    details_ = PropertyDetails(details);
+    number_ = number;
+  }
+
   void ConstantResult(JSObject* holder) {
     lookup_type_ = CONSTANT_TYPE;
     holder_ = holder;