Revert "Move dart2jslib parts into separate libraries."

pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart

 // Copyright (c) 2013, 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.ir_builder_task;
 
 import '../closure.dart' as closurelib;
 import '../closure.dart' hide ClosureScope;
 import '../constants/expressions.dart';
 import '../dart_types.dart';
 import '../dart2jslib.dart';
 import '../elements/elements.dart';
 import '../elements/modelx.dart' show SynthesizedConstructorElementX,
     ConstructorBodyElementX, FunctionSignatureX;
 import '../io/source_information.dart';
 import '../js_backend/js_backend.dart' show JavaScriptBackend,
     SyntheticConstantKind;
-import '../resolution/resolution.dart' show TreeElements;
 import '../resolution/semantic_visitor.dart';
 import '../resolution/operators.dart' as op;
 import '../tree/tree.dart' as ast;
 import '../types/types.dart' show TypeMask;
-import '../universe/universe.dart' show
-    CallStructure,
-    Selector,
-    SelectorKind;
+import '../universe/universe.dart' show SelectorKind, CallStructure;
 import '../constants/values.dart' show ConstantValue;
 import 'cps_ir_nodes.dart' as ir;
 import 'cps_ir_builder.dart';
 import '../native/native.dart' show NativeBehavior;
 
 // TODO(karlklose): remove.
 import '../js/js.dart' as js show js, Template, Expression, Name;
 import '../ssa/ssa.dart' show TypeMaskFactory;
+import '../types/types.dart' show TypeMask;
 import '../util/util.dart';
 
 import 'package:js_runtime/shared/embedded_names.dart'
     show JsBuiltin, JsGetName;
 import '../constants/values.dart';
 
 typedef void IrBuilderCallback(Element element, ir.FunctionDefinition irNode);
 
 /// This task provides the interface to build IR nodes from [ast.Node]s, which
 /// is used from the [CpsFunctionCompiler] to generate code.
@@ skipping 3305 matching lines @@
     if (compiler.backend.isForeign(function)) {
       return handleForeignCode(node, function, argumentList, callStructure);
     } else {
       return irBuilder.buildStaticFunctionInvocation(function, callStructure,
           translateStaticArguments(argumentList, function, callStructure),
           sourceInformation:
               sourceInformationBuilder.buildCall(node, node.selector));
     }
   }
 }