Use common.dart to re-export commonly used entities.

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

 // Copyright (c) 2014, 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.full_emitter;
 
 import 'dart:convert';
 import 'dart:collection' show HashMap;
 
 import 'package:js_runtime/shared/embedded_names.dart' as embeddedNames;
 import 'package:js_runtime/shared/embedded_names.dart' show
     JsBuiltin,
     JsGetName;
 
 import '../headers.dart';
-
 import '../js_emitter.dart' hide Emitter;
 import '../js_emitter.dart' as js_emitter show Emitter;
-
 import '../model.dart';
 import '../program_builder/program_builder.dart';
 
 import '../../common.dart';
-
+import '../../common/names.dart' show
+    Names;
+import '../../compiler.dart' show
+    Compiler;
 import '../../constants/values.dart';
-
+import '../../dart_types.dart' show
+    DartType;
 import '../../deferred_load.dart' show OutputUnit;
-
-import '../../diagnostics/diagnostic_listener.dart' show
-    DiagnosticReporter;
-
-import '../../diagnostics/messages.dart' show
-    MessageKind;
-
-import '../../diagnostics/spannable.dart' show
-    NO_LOCATION_SPANNABLE;
-
 import '../../elements/elements.dart' show
+    ClassElement,
     ConstructorBodyElement,
+    Element,
+    Elements,
     ElementKind,
     FieldElement,
+    FunctionElement,
+    FunctionSignature,
+    LibraryElement,
+    MetadataAnnotation,
+    MethodElement,
+    MemberElement,
     Name,
     ParameterElement,
+    TypedefElement,
     TypeVariableElement,
-    MethodElement,
-    MemberElement;
-
+    VariableElement;
 import '../../hash/sha1.dart' show Hasher;
-
 import '../../io/code_output.dart';
-
 import '../../io/line_column_provider.dart' show
     LineColumnCollector,
     LineColumnProvider;
-
 import '../../io/source_map_builder.dart' show
     SourceMapBuilder;
-
 import '../../js/js.dart' as jsAst;
 import '../../js/js.dart' show js;
-
 import '../../js_backend/js_backend.dart' show
     CheckedModeHelper,
     CompoundName,
     ConstantEmitter,
     CustomElementsAnalysis,
     GetterName,
     JavaScriptBackend,
     JavaScriptConstantCompiler,
     Namer,
     RuntimeTypes,
     SetterName,
     Substitution,
     TypeCheck,
     TypeChecks,
     TypeVariableHandler;
-
+import '../../universe/call_structure.dart' show
+    CallStructure;
+import '../../universe/selector.dart' show
+    Selector;
 import '../../util/characters.dart' show
     $$,
     $A,
     $HASH,
     $PERIOD,
     $Z,
     $a,
     $z;
-
 import '../../util/uri_extras.dart' show
     relativize;
-
 import '../../util/util.dart' show
     equalElements;
 
 part 'class_builder.dart';
 part 'class_emitter.dart';
 part 'code_emitter_helper.dart';
 part 'container_builder.dart';
 part 'declarations.dart';
 part 'deferred_output_unit_hash.dart';
 part 'interceptor_emitter.dart';
@@ skipping 2024 matching lines @@
     for (Element element in compiler.enqueuer.codegen.newlyEnqueuedElements) {
       if (element.isInstanceMember) {
         cachedClassBuilders.remove(element.enclosingClass);
 
         nativeEmitter.cachedBuilders.remove(element.enclosingClass);
 
       }
     }
   }
 }