Begin making copies of AST nodes for constants during resolution.

pkg/analyzer/test/generated/all_the_rest_test.dart

Index: pkg/analyzer/test/generated/all_the_rest_test.dart
diff --git a/pkg/analyzer/test/generated/all_the_rest_test.dart b/pkg/analyzer/test/generated/all_the_rest_test.dart
index e18958753182df55b8560633d5698382e09c03d5..a45e0121e83a7b40eb6b12a57e4a5614320b3502 100644
--- a/pkg/analyzer/test/generated/all_the_rest_test.dart
+++ b/pkg/analyzer/test/generated/all_the_rest_test.dart
@@ -931,10 +931,11 @@ class ConstantFinderTest extends EngineTestCase {
     return constructorInvocations;
   }
 
-  Map<VariableElement, VariableDeclaration> _findVariableDeclarations() {
+  Map<PotentiallyConstVariableElement, VariableDeclaration> _findVariableDeclarations() {
     ConstantFinder finder = new ConstantFinder();
     _node.accept(finder);
-    Map<VariableElement, VariableDeclaration> variableMap = finder.variableMap;
+    Map<PotentiallyConstVariableElement, VariableDeclaration> variableMap =
+        finder.variableMap;
     expect(variableMap, isNotNull);
     return variableMap;
   }
@@ -7848,7 +7849,7 @@ class MockDartSdk implements DartSdk {
 @reflectiveTest
 class ReferenceFinderTest extends EngineTestCase {
   DirectedGraph<AstNode> _referenceGraph;
-  Map<VariableElement, VariableDeclaration> _variableDeclarationMap;
+  Map<PotentiallyConstVariableElement, VariableDeclaration> _variableDeclarationMap;
   Map<ConstructorElement, ConstructorDeclaration> _constructorDeclarationMap;
   VariableDeclaration _head;
   AstNode _tail;
@@ -7856,7 +7857,7 @@ class ReferenceFinderTest extends EngineTestCase {
   void setUp() {
     _referenceGraph = new DirectedGraph<AstNode>();
     _variableDeclarationMap =
-        new HashMap<VariableElement, VariableDeclaration>();
+        new HashMap<PotentiallyConstVariableElement, VariableDeclaration>();
     _constructorDeclarationMap =
         new HashMap<ConstructorElement, ConstructorDeclaration>();
     _head = AstFactory.variableDeclaration("v1");
@@ -7979,8 +7980,8 @@ class ReferenceFinderTest extends EngineTestCase {
     VariableDeclaration variableDeclaration =
         AstFactory.variableDeclaration(name);
     _tail = variableDeclaration;
-    VariableElementImpl variableElement =
-        ElementFactory.localVariableElement2(name);
+    ConstLocalVariableElementImpl variableElement =
+        ElementFactory.constLocalVariableElement(name);
     variableElement.const3 = isConst;
     AstFactory.variableDeclarationList2(
         isConst ? Keyword.CONST : Keyword.VAR, [variableDeclaration]);