Initial implementation of 'Create Method' quick fix

compiler/java/com/google/dart/compiler/ast/DartExpression.java

Index: compiler/java/com/google/dart/compiler/ast/DartExpression.java
diff --git a/compiler/java/com/google/dart/compiler/ast/DartExpression.java b/compiler/java/com/google/dart/compiler/ast/DartExpression.java
index 106ce6bf3fa7aa06eefda0b38cb88d13542bb04b..76c712a421d8855ac98a88196401035ab354f9e4 100644
--- a/compiler/java/com/google/dart/compiler/ast/DartExpression.java
+++ b/compiler/java/com/google/dart/compiler/ast/DartExpression.java
@@ -9,9 +9,25 @@ package com.google.dart.compiler.ast;
  * Abstract base class for Dart expressions.
  */
 public abstract class DartExpression extends DartNode {
+  
+  private Object invocationParameterId;
 
   public boolean isAssignable() {
     // By default you cannot assign to expressions.
     return false;
   }
+
+  /**
+   * @return the ID of parameter, {@link Integer} index of positional, {@link String} name if named.
+   */
+  public Object getInvocationParameterId() {
+    return invocationParameterId;
+  }
+
+  /**
+   * @see #getInvocationParameterId()
+   */
+  public void setInvocationParameterId(Object parameterId) {
+    this.invocationParameterId = parameterId;
+  }
 }