dart2js cps: Fix some analyzer hints in the CPS backend.

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

 // 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 cps_ir.optimization.inline;
 
 import 'cps_fragment.dart';
 import 'cps_ir_builder.dart' show ThisParameterLocal;
 import 'cps_ir_nodes.dart';
 import 'optimizers.dart';
 import 'type_mask_system.dart' show TypeMaskSystem;
-import '../compiler.dart' show Compiler;
 import '../dart_types.dart' show DartType, GenericType;
-import '../io/source_information.dart' show SourceInformation;
 import '../world.dart' show World;
-import '../constants/values.dart' show ConstantValue;
 import '../elements/elements.dart';
 import '../js_backend/js_backend.dart' show JavaScriptBackend;
 import '../js_backend/codegen/task.dart' show CpsFunctionCompiler;
 import '../types/types.dart' show
     FlatTypeMask, ForwardingTypeMask, TypeMask, UnionTypeMask;
 import '../universe/call_structure.dart' show CallStructure;
 import '../universe/selector.dart' show Selector;
 
 /// Inlining stack entries.
 ///
@@ skipping 482 matching lines @@
       // We cannot inline a constructor invocation containing type arguments
       // because CreateInstance in the body does not know the type arguments.
       // We would incorrectly instantiate a class like A instead of A<B>.
       // TODO(kmillikin): try to fix this.
       GenericType generic = node.dartType;
       if (generic.typeArguments.any((DartType t) => !t.isDynamic)) return null;
     }
     return tryInlining(node, node.target, null);
   }
 }