Rename Constant to ConstantValue and ConstExp to ConstantExpression.

sdk/lib/_internal/compiler/implementation/cps_ir/cps_ir_nodes.dart

Index: sdk/lib/_internal/compiler/implementation/cps_ir/cps_ir_nodes.dart
diff --git a/sdk/lib/_internal/compiler/implementation/cps_ir/cps_ir_nodes.dart b/sdk/lib/_internal/compiler/implementation/cps_ir/cps_ir_nodes.dart
index caf530dcc2873c336ea90df4f497d30f32083d23..5cf7f0459563b5753420aec785d7b92dcff4c882 100644
--- a/sdk/lib/_internal/compiler/implementation/cps_ir/cps_ir_nodes.dart
+++ b/sdk/lib/_internal/compiler/implementation/cps_ir/cps_ir_nodes.dart
@@ -7,7 +7,7 @@
 library dart2js.ir_nodes;
 
 import '../constants/expressions.dart';
-import '../constants/values.dart' as values show Constant;
+import '../constants/values.dart' as values show ConstantValue;
 import '../dart2jslib.dart' as dart2js show invariant;
 import '../elements/elements.dart';
 import '../universe/universe.dart' show Selector, SelectorKind;
@@ -449,11 +449,11 @@ class Branch extends Expression {
 }
 
 class Constant extends Primitive {
-  final ConstExp expression;
+  final ConstantExpression expression;
 
   Constant(this.expression);
 
-  values.Constant get value => expression.value;
+  values.ConstantValue get value => expression.value;
 
   accept(Visitor visitor) => visitor.visitConstant(this);
 }
@@ -471,7 +471,7 @@ class ReifyTypeVar extends Primitive {
 
   ReifyTypeVar(this.typeVariable);
 
-  values.Constant get constant => null;
+  values.ConstantValue get constant => null;
 
   accept(Visitor visitor) => visitor.visitReifyTypeVar(this);
 }
@@ -545,7 +545,7 @@ class FunctionDefinition extends Node implements InteriorNode {
   final List<ConstDeclaration> localConstants;
 
   /// Values for optional parameters.
-  final List<ConstExp> defaultParameterValues;
+  final List<ConstantExpression> defaultParameterValues;
 
   FunctionDefinition(this.element, this.returnContinuation,
       this.parameters, this.body, this.localConstants,