Handle more unqualified SendSets

pkg/compiler/lib/src/compile_time_constants.dart

Index: pkg/compiler/lib/src/compile_time_constants.dart
diff --git a/pkg/compiler/lib/src/compile_time_constants.dart b/pkg/compiler/lib/src/compile_time_constants.dart
index b203ec131a418f4730880d49caad317eeb36af95..7774b75f9323b35ff00089d3126f1d9864821d50 100644
--- a/pkg/compiler/lib/src/compile_time_constants.dart
+++ b/pkg/compiler/lib/src/compile_time_constants.dart
@@ -77,6 +77,10 @@ abstract class ConstantCompiler extends ConstantEnvironment {
   ConstantExpression compileMetadata(MetadataAnnotation metadata,
                                      Node node,
                                      TreeElements elements);
+
+  /// Evaluates [constant] and caches the result.
+  // TODO(johnniwinther): Remove when all constants are evaluated.
+  void evaluate(ConstantExpression constant);
 }
 
 /// A [BackendConstantEnvironment] provides access to constants needed for
@@ -157,6 +161,15 @@ abstract class ConstantCompilerBase implements ConstantCompiler {
     return compileVariable(element, isConst: true);
   }
 
+  @override
+  void evaluate(ConstantExpression constant) {
+    constantValueMap.putIfAbsent(constant, () {
+      return constant.evaluate(
+          new _CompilerEnvironment(compiler),
+          constantSystem);
+    });
+  }
+
   ConstantExpression compileVariable(VariableElement element,
                                      {bool isConst: false}) {
 
@@ -1342,3 +1355,14 @@ TreeElements _analyzeElementEagerly(Compiler compiler, AstElement element) {
   compiler.enqueuer.resolution.applyImpact(element.declaration, worldImpact);
   return element.resolvedAst.elements;
 }
+
+class _CompilerEnvironment implements Environment {
+  final Compiler compiler;
+
+  _CompilerEnvironment(this.compiler);
+
+  @override
+  String readFromEnvironment(String name) {
+    return compiler.fromEnvironment(name);
+  }
+}