[runtime] Rename FieldTypeGroup to FieldOwnerGroup.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 1013d87119408b8cbdd835dbc06f2f1d64a09a19..eb8416d45fada5a573553837ee741f9be8bc545c 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -5839,9 +5839,9 @@ class DependentCode: public FixedArray {
     // Group of code that depends on global property values in property cells
     // not being changed.
     kPropertyCellChangedGroup,
-    // Group of code that omit run-time type checks for the field(s) introduced
-    // by this map.
-    kFieldTypeGroup,
+    // Group of code that omit run-time checks for field(s) introduced by
+    // this map, i.e. for the field type.
+    kFieldOwnerGroup,
     // Group of code that omit run-time type checks for initial maps of
     // constructors.
     kInitialMapChangedGroup,