Ensure only a subset of elements enter in Compiler.analyzedElement.

sdk/lib/_internal/compiler/implementation/compile_time_constants.dart

Index: sdk/lib/_internal/compiler/implementation/compile_time_constants.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/compile_time_constants.dart	(revision 27842)
+++ sdk/lib/_internal/compiler/implementation/compile_time_constants.dart	(working copy)
@@ -149,8 +149,15 @@
         Constant result = initialVariableValues[element];
         return result;
       }
-      return compiler.withCurrentElement(element, () {
-        TreeElements definitions = compiler.analyzeElement(element.declaration);
+      Element currentElement = element;
+      if (element.isParameter()
+          || element.isFieldParameter()
+          || element.isVariable()) {
+        currentElement = element.enclosingElement;
+      }
+      return compiler.withCurrentElement(currentElement, () {
+        TreeElements definitions =
+            compiler.analyzeElement(currentElement.declaration);
         Constant constant = compileVariableWithDefinitions(
             element, definitions, isConst: isConst);
         return constant;