Move remaining of file_paths from ContextLocatorImpl.

Change-Id: I7f2362494af731657e59f1189d68790f71d0fc2f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/187200
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
diff --git a/pkg/analyzer/lib/src/dart/analysis/context_locator.dart b/pkg/analyzer/lib/src/dart/analysis/context_locator.dart
index b05e502..7198e6b 100644
--- a/pkg/analyzer/lib/src/dart/analysis/context_locator.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/context_locator.dart
@@ -15,6 +15,7 @@
 import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/dart/analysis/context_root.dart';
 import 'package:analyzer/src/task/options.dart';
+import 'package:analyzer/src/util/file_paths.dart' as file_paths;
 import 'package:analyzer/src/util/yaml.dart';
 import 'package:analyzer/src/workspace/workspace.dart';
 import 'package:glob/glob.dart';
@@ -23,18 +24,6 @@
 
 /// An implementation of a context locator.
 class ContextLocatorImpl implements ContextLocator {
-  /// The name of the analysis options file.
-  static const String ANALYSIS_OPTIONS_NAME = 'analysis_options.yaml';
-
-  /// The name of the `.dart_tool` directory.
-  static const String DOT_DART_TOOL_NAME = '.dart_tool';
-
-  /// The name of the packages file.
-  static const String PACKAGE_CONFIG_JSON_NAME = 'package_config.json';
-
-  /// The name of the packages file.
-  static const String DOT_PACKAGES_NAME = '.packages';
-
   /// The resource provider used to access the file system.
   final ResourceProvider resourceProvider;
 
@@ -348,19 +337,19 @@
   /// Return the analysis options file in the given [folder], or `null` if the
   /// folder does not contain an analysis options file.
   File? _getOptionsFile(Folder folder) =>
-      _getFile(folder, ANALYSIS_OPTIONS_NAME);
+      _getFile(folder, file_paths.analysisOptionsYaml);
 
   /// Return the packages file in the given [folder], or `null` if the folder
   /// does not contain a packages file.
   File? _getPackagesFile(Folder folder) {
     var file = folder
-        .getChildAssumingFolder(DOT_DART_TOOL_NAME)
-        .getChildAssumingFile(PACKAGE_CONFIG_JSON_NAME);
+        .getChildAssumingFolder(file_paths.dotDartTool)
+        .getChildAssumingFile(file_paths.packageConfigJson);
     if (file.exists) {
       return file;
     }
 
-    return _getFile(folder, DOT_PACKAGES_NAME);
+    return _getFile(folder, file_paths.dotPackages);
   }
 
   /// Add to the given lists of [folders] and [files] all of the resources in
diff --git a/pkg/analyzer/lib/src/test_utilities/resource_provider_mixin.dart b/pkg/analyzer/lib/src/test_utilities/resource_provider_mixin.dart
index bf332b0..ea5e130 100644
--- a/pkg/analyzer/lib/src/test_utilities/resource_provider_mixin.dart
+++ b/pkg/analyzer/lib/src/test_utilities/resource_provider_mixin.dart
@@ -4,7 +4,6 @@
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
-import 'package:analyzer/src/dart/analysis/context_locator.dart';
 import 'package:analyzer/src/util/file_paths.dart' as file_paths;
 
 /// A mixin for test classes that adds a [ResourceProvider] and utility methods
@@ -62,12 +61,12 @@
   }
 
   File newOptionsFile(String directoryPath, {String content = ''}) {
-    String path = join(directoryPath, ContextLocatorImpl.ANALYSIS_OPTIONS_NAME);
+    String path = join(directoryPath, file_paths.analysisOptionsYaml);
     return newFile(path, content: content);
   }
 
   File newPackagesFile(String directoryPath) {
-    String path = join(directoryPath, ContextLocatorImpl.DOT_PACKAGES_NAME);
+    String path = join(directoryPath, file_paths.dotPackages);
     return newFile(path);
   }
 
diff --git a/pkg/analyzer/lib/src/util/file_paths.dart b/pkg/analyzer/lib/src/util/file_paths.dart
index 46e450f..2a6318c 100644
--- a/pkg/analyzer/lib/src/util/file_paths.dart
+++ b/pkg/analyzer/lib/src/util/file_paths.dart
@@ -13,12 +13,18 @@
 /// File name of Android manifest files.
 const String androidManifestXml = 'AndroidManifest.xml';
 
+/// The name of the `.dart_tool` directory.
+const String dotDartTool = '.dart_tool';
+
 /// File name of package spec files.
 const String dotPackages = '.packages';
 
 /// The name of the data file used to specify data-driven fixes.
 const String fixDataYaml = 'fix_data.yaml';
 
+/// The name of the package config files.
+const String packageConfigJson = 'package_config.json';
+
 /// File name of pubspec files.
 const String pubspecYaml = 'pubspec.yaml';
 
@@ -52,8 +58,8 @@
 bool isPackageConfigJson(p.Context pathContext, String path) {
   var components = pathContext.split(path);
   return components.length > 2 &&
-      components[components.length - 1] == 'package_config.json' &&
-      components[components.length - 2] == '.dart_tool';
+      components[components.length - 1] == packageConfigJson &&
+      components[components.length - 2] == dotDartTool;
 }
 
 /// Return `true` if [path] is a `pubspec.yaml` file.
diff --git a/pkg/analyzer/test/src/dart/analysis/context_locator_test.dart b/pkg/analyzer/test/src/dart/analysis/context_locator_test.dart
index 116c6f1..e7df093 100644
--- a/pkg/analyzer/test/src/dart/analysis/context_locator_test.dart
+++ b/pkg/analyzer/test/src/dart/analysis/context_locator_test.dart
@@ -6,6 +6,7 @@
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/dart/analysis/context_locator.dart';
 import 'package:analyzer/src/test_utilities/resource_provider_mixin.dart';
+import 'package:analyzer/src/util/file_paths.dart' as file_paths;
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
@@ -573,9 +574,7 @@
 
   void test_locateRoots_options_withExclude_wholeFolder_includedOptions() {
     Folder rootFolder = newFolder('/test/root');
-    File optionsFile = newFile(
-        '/test/root/${ContextLocatorImpl.ANALYSIS_OPTIONS_NAME}',
-        content: '''
+    File optionsFile = newOptionsFile('/test/root', content: '''
 include: has_excludes.yaml
 ''');
     newFile('/test/root/has_excludes.yaml', content: '''
@@ -609,9 +608,7 @@
 
   void test_locateRoots_options_withExclude_wholeFolder_includedOptionsMerge() {
     Folder rootFolder = newFolder('/test/root');
-    File optionsFile = newFile(
-        '/test/root/${ContextLocatorImpl.ANALYSIS_OPTIONS_NAME}',
-        content: '''
+    File optionsFile = newOptionsFile('/test/root', content: '''
 include: has_excludes.yaml
 analyzer:
   exclude:
@@ -802,8 +799,8 @@
   File _newPackageConfigFile(String directoryPath) {
     String path = join(
       directoryPath,
-      ContextLocatorImpl.DOT_DART_TOOL_NAME,
-      ContextLocatorImpl.PACKAGE_CONFIG_JSON_NAME,
+      file_paths.dotDartTool,
+      file_paths.packageConfigJson,
     );
     return newFile(path);
   }