Fix analyzer interpretation of 'ClassName?.staticMember'.

tests/language/conditional_property_access_test.dart

Index: tests/language/conditional_property_access_test.dart
diff --git a/tests/language/conditional_property_access_test.dart b/tests/language/conditional_property_access_test.dart
index ca44f2d9ab30fdd92f2e6de4a92f9ca289cedae3..b5dfa85f432833e9be14bc897a34428c8d7b882e 100644
--- a/tests/language/conditional_property_access_test.dart
+++ b/tests/language/conditional_property_access_test.dart
@@ -15,7 +15,7 @@ class B {}
 class C extends B {
   int v;
   C(this.v);
-  static var staticField;
+  static int staticInt;
 }
 
 C nullC() => null;
@@ -29,9 +29,17 @@ main() {
   Expect.equals(null, nullC()?.v); /// 01: ok
   Expect.equals(1, new C(1)?.v); /// 02: ok
 
+  // C?.id is equivalent to C.id.
+  { C.staticInt = 1; Expect.equals(1, C?.staticInt); } /// 12: ok
+  { h.C.staticInt = 1; Expect.equals(1, h.C?.staticInt); } /// 13: ok
+
   // The static type of e1?.d is the static type of e1.id.
   { int i = new C(1)?.v; Expect.equals(1, i); } /// 03: ok
   { String s = new C(null)?.v; Expect.equals(null, s); } /// 04: static type warning
+  { C.staticInt = 1; int i = C?.staticInt; Expect.equals(1, i); } /// 14: ok
+  { h.C.staticInt = 1; int i = h.C?.staticInt; Expect.equals(1, i); } /// 15: ok
+  { C.staticInt = null; String s = C?.staticInt; Expect.equals(null, s); } /// 16: static type warning
+  { h.C.staticInt = null; String s = h.C?.staticInt; Expect.equals(null, s); } /// 17: static type warning
 
   // Let T be the static type of e1 and let y be a fresh variable of type T.
   // Exactly the same static warnings that would be caused by y.id are also
@@ -39,15 +47,11 @@ main() {
   Expect.equals(null, nullC()?.bad); /// 05: static type warning
   { B b = new C(1); Expect.equals(1, b?.v); } /// 06: static type warning
 
-  // Consequently, '?.' cannot be used to access static properties of classes.
-  Expect.throws(() => C?.staticField, noMethod); /// 07: static type warning
-  Expect.throws(() => h.C?.staticField, noMethod); /// 08: static type warning
-
-  // Nor can it be used to access toplevel properties in libraries imported via
+  // '?.' cannot be used to access toplevel properties in libraries imported via
   // prefix.
   var x = h?.topLevelVar; /// 09: compile-time error
 
-  // However, '?.' can be used to access the hashCode getter on the class Type.
-  Expect.equals(C?.hashCode, (C).hashCode); /// 10: ok
-  Expect.equals(h.C?.hashCode, (h.C).hashCode); /// 11: ok
+  // Nor can it be used to access the hashCode getter on the class Type.
+  Expect.throws(() => C?.hashCode, noMethod); /// 10: static type warning
+  Expect.throws(() => h.C?.hashCode, noMethod); /// 11: static type warning
 }