dart2js: move type-mask intermediate data from tree-elements into the global

pkg/compiler/lib/src/dump_info.dart

Index: pkg/compiler/lib/src/dump_info.dart
diff --git a/pkg/compiler/lib/src/dump_info.dart b/pkg/compiler/lib/src/dump_info.dart
index 4b5d1a71c1e89ccdf697eb6e3409bf2192235b76..e1e39c807f4aa9b130073a2471597ee5af6a3370 100644
--- a/pkg/compiler/lib/src/dump_info.dart
+++ b/pkg/compiler/lib/src/dump_info.dart
@@ -115,8 +115,10 @@ class ElementInfoCollector extends BaseElementVisitor<Info, dynamic> {
     return info;
   }
 
+  _resultOf(e) => compiler.globalInference.results.resultOf(e);
+
   FieldInfo visitFieldElement(FieldElement element, _) {
-    TypeMask inferredType = compiler.globalInference.results.typeOf(element);
+    TypeMask inferredType = _resultOf(element).type;
     // If a field has an empty inferred type it is never used.
     if (inferredType == null || inferredType.isEmpty) return null;
 
@@ -249,10 +251,8 @@ class ElementInfoCollector extends BaseElementVisitor<Info, dynamic> {
     if (element.hasFunctionSignature) {
       FunctionSignature signature = element.functionSignature;
       signature.forEachParameter((parameter) {
-        parameters.add(new ParameterInfo(
-            parameter.name,
-            '${compiler.globalInference.results.typeOf(parameter)}',
-            '${parameter.node.type}'));
+        parameters.add(new ParameterInfo(parameter.name,
+            '${_resultOf(parameter).type}', '${parameter.node.type}'));
       });
     }
 
@@ -263,8 +263,7 @@ class ElementInfoCollector extends BaseElementVisitor<Info, dynamic> {
         compiler.closedWorld.allFunctions.contains(element)) {
       returnType = '${element.type.returnType}';
     }
-    String inferredReturnType =
-        '${compiler.globalInference.results.returnTypeOf(element)}';
+    String inferredReturnType = '${_resultOf(element).returnType}';
     String sideEffects =
         '${compiler.closedWorld.getSideEffectsOfElement(element)}';