Change signature of lookupConstructor to only require a name.

pkg/compiler/lib/src/compiler.dart

Index: pkg/compiler/lib/src/compiler.dart
diff --git a/pkg/compiler/lib/src/compiler.dart b/pkg/compiler/lib/src/compiler.dart
index af29cdeb94325bbba76415894dafb38b5edaf296..30fb026e55380f0e5cc4bc94b4ab0f4d9f581505 100644
--- a/pkg/compiler/lib/src/compiler.dart
+++ b/pkg/compiler/lib/src/compiler.dart
@@ -1352,16 +1352,17 @@ abstract class Compiler implements DiagnosticListener {
       symbolConstructor = cls.constructors.head;
     } else if (symbolImplementationClass == cls) {
       symbolValidatedConstructor = symbolImplementationClass.lookupConstructor(
-          symbolValidatedConstructorSelector);
+          symbolValidatedConstructorSelector.name);
     } else if (mirrorsUsedClass == cls) {
       mirrorsUsedConstructor = cls.constructors.head;
     } else if (intClass == cls) {
-      intEnvironment = intClass.lookupConstructor(fromEnvironmentSelector);
+      intEnvironment = intClass.lookupConstructor(fromEnvironmentSelector.name);

[Johnni Winther, 2015/01/08 09:47:44]

Do we still need [fromEnvironmentSelector] as a [Selector] after this CL? If
not, replace it with a constant for the name.

[herhut, 2015/01/22 10:33:20]

Done.

     } else if (stringClass == cls) {
       stringEnvironment =
-          stringClass.lookupConstructor(fromEnvironmentSelector);
+          stringClass.lookupConstructor(fromEnvironmentSelector.name);
     } else if (boolClass == cls) {
-      boolEnvironment = boolClass.lookupConstructor(fromEnvironmentSelector);
+      boolEnvironment =
+          boolClass.lookupConstructor(fromEnvironmentSelector.name);
     }
   }
 
@@ -1398,19 +1399,13 @@ abstract class Compiler implements DiagnosticListener {
   Element _unnamedListConstructor;
   Element get unnamedListConstructor {
     if (_unnamedListConstructor != null) return _unnamedListConstructor;
-    Selector callConstructor = new Selector.callConstructor(
-        "", listClass.library);
-    return _unnamedListConstructor =
-        listClass.lookupConstructor(callConstructor);
+    return _unnamedListConstructor = listClass.lookupDefaultConstructor();
   }
 
   Element _filledListConstructor;
   Element get filledListConstructor {
     if (_filledListConstructor != null) return _filledListConstructor;
-    Selector callConstructor = new Selector.callConstructor(
-        "filled", listClass.library);
-    return _filledListConstructor =
-        listClass.lookupConstructor(callConstructor);
+    return _filledListConstructor = listClass.lookupConstructor("filled");
   }
 
   /**