improve parser recovery for import statements

pkg/analyzer/test/generated/parser_test.dart

Index: pkg/analyzer/test/generated/parser_test.dart
diff --git a/pkg/analyzer/test/generated/parser_test.dart b/pkg/analyzer/test/generated/parser_test.dart
index 8d5bc82c5bc39fe1ff5f66b4dac979a8a77752b2..3cf943dcf9308ae8071dbac9f1e57ac4b988cce3 100644
--- a/pkg/analyzer/test/generated/parser_test.dart
+++ b/pkg/analyzer/test/generated/parser_test.dart
@@ -3269,7 +3269,7 @@ class B = Object with A {}''', [ParserErrorCode.EXPECTED_TOKEN]);
     parseExpression("m(f() => 0);", [ParserErrorCode.EXPECTED_TOKEN]);
   }
 
-  void test_importDirectivePartial() {
+  void test_importDirectivePartial_as() {
     CompilationUnit unit = ParserTestCase.parseCompilationUnit(
         "import 'b.dart' d as b;",
         [ParserErrorCode.UNEXPECTED_TOKEN]);
@@ -3279,6 +3279,26 @@ class B = Object with A {}''', [ParserErrorCode.EXPECTED_TOKEN]);
     expect(unit.declarations, hasLength(0));
   }
 
+  void test_importDirectivePartial_show() {
+    CompilationUnit unit = ParserTestCase.parseCompilationUnit(
+        "import 'b.dart' d show foo;",
+        [ParserErrorCode.UNEXPECTED_TOKEN]);
+    ImportDirective importDirective = unit.childEntities.first;
+    expect(importDirective.combinators, hasLength(1));
+    expect(unit.directives, hasLength(1));
+    expect(unit.declarations, hasLength(0));
+  }
+
+  void test_importDirectivePartial_hide() {
+    CompilationUnit unit = ParserTestCase.parseCompilationUnit(
+        "import 'b.dart' d hide foo;",
+        [ParserErrorCode.UNEXPECTED_TOKEN]);
+    ImportDirective importDirective = unit.childEntities.first;
+    expect(importDirective.combinators, hasLength(1));
+    expect(unit.directives, hasLength(1));
+    expect(unit.declarations, hasLength(0));
+  }
+
   void test_incomplete_conditionalExpression() {
     parseExpression("x ? 0", [
       ParserErrorCode.EXPECTED_TOKEN,