Split World usage into open, inference, and closed world.

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 d5314b053e02fa9769517e2deba63bef2ff3a47b..f0d91a4e4576f29f96f8b0495b42396d10ec0eaa 100644
--- a/pkg/compiler/lib/src/dump_info.dart
+++ b/pkg/compiler/lib/src/dump_info.dart
@@ -266,12 +266,13 @@ class ElementInfoCollector extends BaseElementVisitor<Info, dynamic> {
     // TODO(sigmund): why all these checks?
     if (element.isInstanceMember &&
         !element.isAbstract &&
-        compiler.world.allFunctions.contains(element)) {
+        compiler.closedWorld.allFunctions.contains(element)) {
       returnType = '${element.type.returnType}';
     }
     String inferredReturnType =
         '${compiler.globalInference.getGuaranteedReturnTypeOfElement(element)}';
-    String sideEffects = '${compiler.world.getSideEffectsOfElement(element)}';
+    String sideEffects =
+        '${compiler.closedWorld.getSideEffectsOfElement(element)}';
 
     int inlinedCount = compiler.dumpInfoTask.inlineCount[element];
     if (inlinedCount == null) inlinedCount = 0;
@@ -438,7 +439,7 @@ class DumpInfoTask extends CompilerTask implements InfoReporter {
         element,
         impact,
         new WorldImpactVisitorImpl(visitDynamicUse: (dynamicUse) {
-          selections.addAll(compiler.world.allFunctions
+          selections.addAll(compiler.closedWorld.allFunctions
               .filter(dynamicUse.selector, dynamicUse.mask)
               .map((e) => new Selection(e, dynamicUse.mask)));
         }, visitStaticUse: (staticUse) {