Fix compiler formatter errors.

pkg/compiler/lib/src/js_backend/backend.dart

 // Copyright (c) 2012, 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 js_backend.backend;
 
 import 'dart:async' show Future;
 
 import 'package:js_runtime/shared/embedded_names.dart' as embeddedNames;
 
@@ skipping 556 matching lines @@
   DiagnosticReporter get reporter => compiler.reporter;
 
   CommonElements get commonElements => compiler.commonElements;
 
   Resolution get resolution => compiler.resolution;
 
   Target get target => _target;
 
   /// Resolution analysis for tracking reflective access to type variables.
   TypeVariableResolutionAnalysis get typeVariableResolutionAnalysis {
-    assert(invariant(NO_LOCATION_SPANNABLE, _typeVariableCodegenAnalysis == null,
+    assert(invariant(
+        NO_LOCATION_SPANNABLE, _typeVariableCodegenAnalysis == null,
         message: "TypeVariableHandler has already been created."));
     return _typeVariableResolutionAnalysis;
   }
 
   /// Codegen handler for reflective access to type variables.
   TypeVariableCodegenAnalysis get typeVariableCodegenAnalysis {
-    assert(invariant(NO_LOCATION_SPANNABLE, _typeVariableCodegenAnalysis != null,
+    assert(invariant(
+        NO_LOCATION_SPANNABLE, _typeVariableCodegenAnalysis != null,
         message: "TypeVariableHandler has not been created yet."));
     return _typeVariableCodegenAnalysis;
   }
 
   MirrorsData get mirrorsData => _mirrorsData;
 
   MirrorsDataBuilder get mirrorsDataBuilder => _mirrorsData;
 
   /// Codegen support for tree-shaking entries of `LookupMap`.
   LookupMapAnalysis get lookupMapAnalysis {
@@ skipping 304 matching lines @@
             typeVariableResolutionAnalysis,
             _nativeResolutionEnqueuer),
         new ElementResolutionWorldBuilder(
             this, compiler.resolution, const OpenWorldStrategy()),
         new ResolutionWorkItemBuilder(compiler.resolution));
   }
 
   /// Creates an [Enqueuer] for code generation specific to this backend.
   CodegenEnqueuer createCodegenEnqueuer(
       CompilerTask task, Compiler compiler, ClosedWorld closedWorld) {
-    _typeVariableCodegenAnalysis = new TypeVariableCodegenAnalysis(this, helpers, mirrorsData);
+    _typeVariableCodegenAnalysis =
+        new TypeVariableCodegenAnalysis(this, helpers, mirrorsData);
     _lookupMapAnalysis = new LookupMapAnalysis(
         reporter,
         constantSystem,
         constants,
         compiler.elementEnvironment,
         commonElements,
         helpers,
         backendClasses,
         lookupMapResolutionAnalysis);
     return new CodegenEnqueuer(
@@ skipping 680 matching lines @@
     return _backend.defaultSuperclass(element);
   }
 
   @override
   bool isNativeClass(ClassEntity element) =>
       _backend.nativeBaseData.isNativeClass(element);
 
   @override
   bool isForeign(Element element) => _backend.isForeign(element);
 }