[cfe] Patch declarations through fragments

Change-Id: I942f2b0b08e69012140d4671722411c86b073504
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/413681
Commit-Queue: Johnni Winther <[email protected]>
Reviewed-by: Jens Johansen <[email protected]>

Author: johnniwinther

pkg/front_end/lib/src/base/name_space.dart

@@ -172,6 +172,7 @@ class NameSpaceImpl implements NameSpace {
   }
 
   @override
+  // Coverage-ignore(suite): Not run.
   void forEachLocalMember(void Function(String name, Builder member) f) {
     if (_getables != null) {
       for (MapEntry<String, Builder> entry in _getables!.entries) {
@@ -181,6 +182,7 @@ class NameSpaceImpl implements NameSpace {
   }
 
   @override
+  // Coverage-ignore(suite): Not run.
   void forEachLocalSetter(void Function(String name, MemberBuilder member) f) {
     if (_setables != null) {
       for (MapEntry<String, MemberBuilder> entry in _setables!.entries) {