[turbofan]: Add better encapsulation to LinkageLocation

test/unittests/compiler/linkage-tail-call-unittest.cc

Index: test/unittests/compiler/linkage-tail-call-unittest.cc
diff --git a/test/unittests/compiler/linkage-tail-call-unittest.cc b/test/unittests/compiler/linkage-tail-call-unittest.cc
index cd9ba00d7428154bf35657b100180b66488b0f8f..5d24a3bd1da6963f2a5984eac10899205e9e6ca7 100644
--- a/test/unittests/compiler/linkage-tail-call-unittest.cc
+++ b/test/unittests/compiler/linkage-tail-call-unittest.cc
@@ -28,7 +28,7 @@ class LinkageTailCall : public TestWithZone {
         locations->return_count(), locations->parameter_count(), kMachineTypes);
     return new (zone())
         CallDescriptor(CallDescriptor::kCallCodeObject, kMachAnyTagged,
-                       LinkageLocation::AnyRegister(),
+                       LinkageLocation::ForAnyRegister(),
                        types,                     // machine_sig
                        locations,                 // location_sig
                        0,                         // js_parameter_count
@@ -39,9 +39,13 @@ class LinkageTailCall : public TestWithZone {
                        "");
   }
 
-  LinkageLocation StackLocation(int loc) { return LinkageLocation(-loc); }
+  LinkageLocation StackLocation(int loc) {
+    return LinkageLocation::ForCallerFrameSlot(-loc);
+  }
 
-  LinkageLocation RegisterLocation(int loc) { return LinkageLocation(loc); }
+  LinkageLocation RegisterLocation(int loc) {
+    return LinkageLocation::ForRegister(loc);
+  }
 };