Initial implementation of MemoryIndexStoreImpl and IndexContributor.

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/ClassDeclaration.java

Index: editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/ClassDeclaration.java
diff --git a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/ClassDeclaration.java b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/ClassDeclaration.java
index d79de7485d164f706e8d2e3ef4cea8efeef553bf..2a847137cd56755bb15ab60d73172ad5cc652cff 100644
--- a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/ClassDeclaration.java
+++ b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/ClassDeclaration.java
@@ -13,6 +13,7 @@
  */
 package com.google.dart.engine.ast;
 
+import com.google.dart.engine.element.ClassElement;
 import com.google.dart.engine.scanner.Token;
 
 import java.util.List;
@@ -137,6 +138,14 @@ public class ClassDeclaration extends CompilationUnitMember {
     return classKeyword;
   }
 
+  /**
+   * @return the {@link ClassElement} associated with this identifier, or {@code null} if the AST
+   *         structure has not been resolved or if this identifier could not be resolved.
+   */
+  public ClassElement getElement() {
+    return name != null ? (ClassElement) name.getElement() : null;
+  }
+
   @Override
   public Token getEndToken() {
     return rightBracket;