Only emit members in mirror helper symbolsmap.

sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart

Index: sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart
diff --git a/sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart b/sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart
index 73480bf01e2e008b890b53c465dea118233272b6..cb7c4a771d8501200110b39ec591550359b972fe 100644
--- a/sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart
+++ b/sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart
@@ -180,33 +180,24 @@ void renamePlaceholders(
     renameElement = makeElementRenamer(rename, generateUniqueName);
 
     List<Set<Node>> allLocals = new List<Set<Node>>();
-    // If we are using the mirror_helper library we need all names to be
-    // globally unique.
-    if (uniqueGlobalNaming) {
-      //TODO(zarah): Change this so that local variables don't get unique names.
-      for (var functionScope in placeholderCollector.functionScopes.values) {
-        functionScope.localPlaceholders.forEach(
-            (ph) => allLocals.add(ph.nodes.toSet()));
+
+    // Build a list sorted by usage of local nodes that will be renamed to
+    // the same identifier. So the top-used local variables in all functions
+    // will be renamed first and will all share the same new identifier.
+    for (var functionScope in placeholderCollector.functionScopes.values) {
+      // Add current sorted local identifiers to the whole sorted list
+      // of all local identifiers for all functions.
+      List<LocalPlaceholder> currentSortedPlaceholders =
+          sorted(functionScope.localPlaceholders,
+              compareBy((LocalPlaceholder ph) => -ph.nodes.length));
+      List<Set<Node>> currentSortedNodes =
+          currentSortedPlaceholders.map((ph) => ph.nodes).toList();
+      // Make room in all sorted locals list for new stuff.
+      while (currentSortedNodes.length > allLocals.length) {
+        allLocals.add(new Set<Node>());
       }
-    } else {
-      // Build a sorted (by usage) list of local nodes that will be renamed to
-      // the same identifier. So the top-used local variables in all functions
-      // will be renamed first and will all share the same new identifier.
-      for (var functionScope in placeholderCollector.functionScopes.values) {
-        // Add current sorted local identifiers to the whole sorted list
-        // of all local identifiers for all functions.
-        List<LocalPlaceholder> currentSortedPlaceholders =
-            sorted(functionScope.localPlaceholders,
-                compareBy((LocalPlaceholder ph) => -ph.nodes.length));
-        List<Set<Node>> currentSortedNodes =
-            currentSortedPlaceholders.map((ph) => ph.nodes).toList();
-        // Make room in all sorted locals list for new stuff.
-        while (currentSortedNodes.length > allLocals.length) {
-          allLocals.add(new Set<Node>());
-        }
-        for (int i = 0; i < currentSortedNodes.length; i++) {
-          allLocals[i].addAll(currentSortedNodes[i]);
-        }
+      for (int i = 0; i < currentSortedNodes.length; i++) {
+        allLocals[i].addAll(currentSortedNodes[i]);
       }
     }