More spread test fixes.

Change-Id: I87ff7f75cbe10598f831fb969ad04ba612bd4b0c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/97004
Auto-Submit: Bob Nystrom <[email protected]>
Reviewed-by: Mark Zhou <[email protected]>
Commit-Queue: Bob Nystrom <[email protected]>

Author: munificent

tests/language_2/spread_collections/inference_test.dart

@@ -113,5 +113,5 @@ void testTopDownInference() {
   Expect.setEquals(<int>{}, <int>{...expectIntSet()});
 
   // Bottom up-inference from elements is not pushed back down into spread.
-  Expect.setEquals(<int>{}, {1, ...expectDynamicSet()});
+  Expect.setEquals(<int>{1}, {1, ...expectDynamicSet()});
 }

tests/language_2/spread_collections/map_set_ambiguity_test.dart

@@ -32,14 +32,14 @@ void testBottomUpInference() {
   // Expect.type<...>({...dyn});
   Expect.type<Set<int>>({...iterable});
   Expect.type<Set<int>>({...customSet});
-  Expect.type<Map<int, int>>({...customMap});
+  Expect.type<Map<int, String>>({...customMap});
 
   Expect.type<Map<int, int>>({...map, ...map});
   // Expect.type<...>({...map, ...set});
   Expect.type<Map<dynamic, dynamic>>({...map, ...dynMap});
   // Expect.type<...>({...map, ...iterable});
   // Expect.type<...>({...map, ...customSet});
-  Expect.type<Map<int, int>>({...map, ...customMap});
+  Expect.type<Map<int, Object>>({...map, ...customMap});
 
   Expect.type<Set<int>>({...set, ...set});
   Expect.type<Set<dynamic>>({...set, ...dynSet});
@@ -59,7 +59,7 @@ void testBottomUpInference() {
   Expect.type<Set<int>>({...customSet, ...customSet});
   // Expect.type<...>({...customSet, ...customMap});
 
-  Expect.type<Map<int, int>>({...customMap, ...customMap});
+  Expect.type<Map<int, String>>({...customMap, ...customMap});
 }
 
 void testTopDownInference() {