Implement SearchEngine.searchMemberDeclarations() for the new driver.

pkg/analyzer/lib/src/dart/analysis/search.dart

Index: pkg/analyzer/lib/src/dart/analysis/search.dart
diff --git a/pkg/analyzer/lib/src/dart/analysis/search.dart b/pkg/analyzer/lib/src/dart/analysis/search.dart
index 59a1a63dda8b575b6f202e4d218a06e5a377066b..3ec8f884804ee69cb6d48adabcb6f68d6285b1e8 100644
--- a/pkg/analyzer/lib/src/dart/analysis/search.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/search.dart
@@ -34,6 +34,30 @@ class Search {
   Search(this._driver);
 
   /**
+   * Returns class members with names matching the given [regExp].
+   */
+  Future<List<Element>> classMembers(RegExp regExp) async {
+    List<Element> elements = <Element>[];
+
+    void addElement(Element element) {
+      if (!element.isSynthetic && regExp.hasMatch(element.displayName)) {
+        elements.add(element);
+      }
+    }
+
+    for (FileState file in _driver.fsState.knownFiles) {
+      CompilationUnitElement unitElement =
+          await _driver.getUnitElement(file.path);
+      for (ClassElement clazz in unitElement.types) {
+        clazz.accessors.forEach(addElement);
+        clazz.fields.forEach(addElement);
+        clazz.methods.forEach(addElement);
+      }
+    }
+    return elements;
+  }
+
+  /**
    * Returns references to the [element].
    */
   Future<List<SearchResult>> references(Element element) async {