Implement Search.classMembers() using getFilesDefiningClassMemberName().

pkg/analyzer/test/src/dart/analysis/search_test.dart

Index: pkg/analyzer/test/src/dart/analysis/search_test.dart
diff --git a/pkg/analyzer/test/src/dart/analysis/search_test.dart b/pkg/analyzer/test/src/dart/analysis/search_test.dart
index 93cc81665c78b30983d5a8a8399c5fd91fdeb0f9..a732388a5b7a801ae08b2722e4534c1ec8725014 100644
--- a/pkg/analyzer/test/src/dart/analysis/search_test.dart
+++ b/pkg/analyzer/test/src/dart/analysis/search_test.dart
@@ -86,8 +86,7 @@ class B {
 ''');
     ClassElement a = _findElement('A');
     ClassElement b = _findElement('B');
-    RegExp regExp = new RegExp(r'^test$');
-    expect(await driver.search.classMembers(regExp),
+    expect(await driver.search.classMembers('test'),
         unorderedEquals([a.methods[0], b.fields[0]]));
   }
 
@@ -95,8 +94,7 @@ class B {
     await _resolveTestUnit('''
 import 'not-dart.txt';
 ''');
-    RegExp regExp = new RegExp(r'^test$');
-    expect(await driver.search.classMembers(regExp), isEmpty);
+    expect(await driver.search.classMembers('test'), isEmpty);
   }
 
   test_searchMemberReferences_qualified_resolved() async {