Fix analyzer's handling of import prefixes not followed by '.'.

pkg/analyzer/test/generated/static_warning_code_test.dart

Index: pkg/analyzer/test/generated/static_warning_code_test.dart
diff --git a/pkg/analyzer/test/generated/static_warning_code_test.dart b/pkg/analyzer/test/generated/static_warning_code_test.dart
index 6df4785a2bf39394eedc1d301f1b442a268d8c06..0aac65afcdd935aab311d06c102cad029d461f9e 100644
--- a/pkg/analyzer/test/generated/static_warning_code_test.dart
+++ b/pkg/analyzer/test/generated/static_warning_code_test.dart
@@ -3371,39 +3371,12 @@ f(var l) {
     assertErrors(source, [StaticWarningCode.UNDEFINED_IDENTIFIER]);
   }
 
-  void test_undefinedIdentifier_function_prefix() {
-    addNamedSource("/lib.dart", r'''
-library lib;
-class C {}''');
-    Source source = addSource(r'''
-import 'lib.dart' as b;
-
-int a() => b;
-b.C c;''');
-    resolve(source);
-    assertErrors(source, [StaticWarningCode.UNDEFINED_IDENTIFIER]);
-    verify([source]);
-  }
-
   void test_undefinedIdentifier_initializer() {
     Source source = addSource("var a = b;");
     resolve(source);
     assertErrors(source, [StaticWarningCode.UNDEFINED_IDENTIFIER]);
   }
 
-  void test_undefinedIdentifier_initializer_prefix() {
-    addNamedSource("/lib.dart", r'''
-library lib;
-class C {}''');
-    Source source = addSource(r'''
-import 'lib.dart' as b;
-
-var a = b;
-b.C c;''');
-    resolve(source);
-    assertErrors(source, [StaticWarningCode.UNDEFINED_IDENTIFIER]);
-  }
-
   void test_undefinedIdentifier_methodInvocation() {
     Source source = addSource("f() { C.m(); }");
     resolve(source);