Move byte_store.dart and file_byte_store.dart to their own subdirectory.

pkg/analyzer/test/generated/resolver_test_case.dart

 // Copyright (c) 2016, 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 analyzer.test.generated.resolver_test_case;
 
 import 'dart:async';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
@@ skipping 10 matching lines @@
 import 'package:analyzer/src/dart/element/type.dart';
 import 'package:analyzer/src/error/codes.dart';
 import 'package:analyzer/src/generated/engine.dart' hide AnalysisResult;
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/resolver.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/generated/testing/ast_test_factory.dart';
 import 'package:analyzer/src/generated/testing/element_factory.dart';
 import 'package:front_end/src/base/performace_logger.dart';
-import 'package:front_end/src/incremental/byte_store.dart';
+import 'package:front_end/src/byte_store/byte_store.dart';
 import 'package:test/test.dart';
 
 import '../src/context/mock_sdk.dart';
 import 'analysis_context_factory.dart';
 import 'test_support.dart';
 
 /**
  * An AST visitor used to verify that all of the nodes in an AST structure that
  * should have been resolved were resolved.
  */
@@ skipping 888 matching lines @@
     }
   }
 }
 
 class TestAnalysisResult {
   final Source source;
   final CompilationUnit unit;
   final List<AnalysisError> errors;
   TestAnalysisResult(this.source, this.unit, this.errors);
 }