dart2js: add skeleton of startup-emitter.

pkg/compiler/lib/src/js_emitter/startup_emitter/emitter.dart

Index: pkg/compiler/lib/src/js_emitter/startup_emitter/emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/lazy_emitter/emitter.dart b/pkg/compiler/lib/src/js_emitter/startup_emitter/emitter.dart
similarity index 82%
copy from pkg/compiler/lib/src/js_emitter/lazy_emitter/emitter.dart
copy to pkg/compiler/lib/src/js_emitter/startup_emitter/emitter.dart
index e8b7a5d974beb9b34f5a93a25f7cbaa2d5ea1d99..99cb746cfc85ec87b51549b0d1ff3669a00e0646 100644
--- a/pkg/compiler/lib/src/js_emitter/lazy_emitter/emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/startup_emitter/emitter.dart
@@ -1,8 +1,8 @@
-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-library dart2js.js_emitter.lazy_emitter;
+library dart2js.js_emitter.startup_emitter;
 
 import 'package:js_runtime/shared/embedded_names.dart' show
     JsBuiltin,
@@ -17,8 +17,8 @@ import '../../elements/elements.dart' show FieldElement;
 import '../../js/js.dart' as js;
 
 import '../../js_backend/js_backend.dart' show
-    JavaScriptBackend,
-    Namer;
+JavaScriptBackend,
+Namer;
 
 import '../js_emitter.dart' show
     NativeEmitter;
@@ -47,13 +47,11 @@ class Emitter implements emitterTask.Emitter {
     return _emitter.emitProgram(program);
   }
 
-  // TODO(floitsch): copied from full emitter. Adjust or share.
   @override
   bool isConstantInlinedOrAlreadyEmitted(ConstantValue constant) {
     return _emitter.isConstantInlinedOrAlreadyEmitted(constant);
   }
 
-  // TODO(floitsch): copied from full emitter. Adjust or share.
   @override
   int compareConstants(ConstantValue a, ConstantValue b) {
     return _emitter.compareConstants(a, b);
@@ -85,7 +83,7 @@ class Emitter implements emitterTask.Emitter {
   @override
   js.Expression isolateLazyInitializerAccess(FieldElement element) {
     return js.js('#.#', [namer.globalObjectFor(element),
-                         namer.lazyInitializerName(element)]);
+    namer.lazyInitializerName(element)]);
   }
 
   @override
@@ -118,16 +116,12 @@ class Emitter implements emitterTask.Emitter {
 
   @override
   js.Expression interceptorClassAccess(ClassElement element) {
-    // Some interceptors are eagerly constructed. However, native interceptors
-    // aren't.
-    return js.js('#.ensureResolved()', _globalPropertyAccess(element));
+    return _globalPropertyAccess(element);
   }
 
   @override
   js.Expression typeAccess(Element element) {
-    // TODO(floitsch): minify 'ensureResolved'.
-    // TODO(floitsch): don't emit `ensureResolved` for eager classes.
-    return js.js('#.ensureResolved()', _globalPropertyAccess(element));
+    return _globalPropertyAccess(element);
   }
 
   @override
@@ -154,11 +148,11 @@ class Emitter implements emitterTask.Emitter {
 
       case JsBuiltin.createFunctionTypeRti:
         return _backend.rti.representationGenerator
-            .templateForCreateFunctionType;
+        .templateForCreateFunctionType;
 
       case JsBuiltin.isSubtype:
-        // TODO(floitsch): move this closer to where is-check properties are
-        // built.
+      // TODO(floitsch): move this closer to where is-check properties are
+      // built.
         String isPrefix = namer.operatorIsPrefix;
         return js.js.expressionTemplateFor("('$isPrefix' + #) in #.prototype");
 
@@ -166,14 +160,18 @@ class Emitter implements emitterTask.Emitter {
         return js.js.expressionTemplateFor('#.$typeNameProperty === #');
 
       case JsBuiltin.getMetadata:
-        return _emitter.templateForReadMetadata;
+        String metadataAccess =
+            _emitter.generateEmbeddedGlobalAccessString(METADATA);
+        return js.js.expressionTemplateFor("$metadataAccess[#]");
 
       case JsBuiltin.getType:
-        return _emitter.templateForReadType;
+        String typesAccess =
+            _emitter.generateEmbeddedGlobalAccessString(TYPES);
+        return js.js.expressionTemplateFor("$typesAccess[#]");
 
       default:
         _compiler.internalError(NO_LOCATION_SPANNABLE,
-                                "Unhandled Builtin: $builtin");
+            "Unhandled Builtin: $builtin");
         return null;
     }
   }