Fix more tests on windows bots

pkg/analyzer/test/src/context/mock_sdk.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 analyzer.test.src.context.mock_sdk;
 
 import 'package:analyzer/file_system/file_system.dart' as resource;
 import 'package:analyzer/file_system/memory_file_system.dart' as resource;
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/context/context.dart';
@@ skipping 321 matching lines @@
   AnalysisContextImpl _analysisContext;
 
   @override
   final List<SdkLibrary> sdkLibraries;
 
   /**
    * The cached linked bundle of the SDK.
    */
   PackageBundle _bundle;
 
-  MockSdk({bool dartAsync: true, resource.ResourceProvider resourceProvider})
+  MockSdk(
+      {bool dartAsync: true, resource.MemoryResourceProvider resourceProvider})
       : provider = resourceProvider ?? new resource.MemoryResourceProvider(),
         sdkLibraries = dartAsync ? _LIBRARIES : [_LIB_CORE],
         uriMap = dartAsync ? FULL_URI_MAP : NO_ASYNC_URI_MAP {
     for (_MockSdkLibrary library in sdkLibraries) {
-      provider.newFile(library.path, library.content);
+      provider.newFile(provider.convertPath(library.path), library.content);
       library.parts.forEach((String path, String content) {
-        provider.newFile(path, content);
+        provider.newFile(provider.convertPath(path), content);
       });
     }
     provider.newFile(
-        '/_internal/sdk_library_metadata/lib/libraries.dart', librariesContent);
+        provider
+            .convertPath('/_internal/sdk_library_metadata/lib/libraries.dart'),
+        librariesContent);
   }
 
   @override
   AnalysisContextImpl get context {
     if (_analysisContext == null) {
       _analysisContext = new _SdkAnalysisContext(this);
       SourceFactory factory = new SourceFactory([new DartUriResolver(this)]);
       _analysisContext.sourceFactory = factory;
     }
     return _analysisContext;
@@ skipping 10 matching lines @@
   Source fromFileUri(Uri uri) {
     String filePath = uri.path;
     String libPath = '$sdkRoot/lib';
     if (!filePath.startsWith("$libPath/")) {
       return null;
     }
     for (SdkLibrary library in sdkLibraries) {
       String libraryPath = library.path;
       if (filePath.replaceAll('\\', '/') == libraryPath) {
         try {
-          resource.File file = provider.getResource(uri.path);
+          resource.File file =
+              provider.getResource(provider.convertPath(filePath));
           Uri dartUri = Uri.parse(library.shortName);
           return file.createSource(dartUri);
         } catch (exception) {
           return null;
         }
       }
       if (filePath.startsWith("$libraryPath/")) {
         String pathInLibrary = filePath.substring(libraryPath.length + 1);
         String path = '${library.shortName}/$pathInLibrary';
         try {
-          resource.File file = provider.getResource(uri.path);
+          resource.File file =
+              provider.getResource(provider.convertPath(filePath));
           Uri dartUri = new Uri(scheme: 'dart', path: path);
           return file.createSource(dartUri);
         } catch (exception) {
           return null;
         }
       }
     }
     return null;
   }
 
@@ skipping 16 matching lines @@
     // getSdkLibrary() is only used to determine whether a library is internal
     // to the SDK.  The mock SDK doesn't have any internals, so it's safe to
     // return null.
     return null;
   }
 
   @override
   Source mapDartUri(String dartUri) {
     String path = uriMap[dartUri];
     if (path != null) {
-      resource.File file = provider.getResource(path);
+      resource.File file = provider.getResource(provider.convertPath(path));
       Uri uri = new Uri(scheme: 'dart', path: dartUri.substring(5));
       return file.createSource(uri);
     }
-
     // If we reach here then we tried to use a dartUri that's not in the
     // table above.
     return null;
   }
 
   /**
    * This method is used to apply patches to [MockSdk].  It may be called only
    * before analysis, i.e. before the analysis context was created.
    */
   void updateUriFile(String uri, String updateContent(String content)) {
     assert(_analysisContext == null);
     String path = FULL_URI_MAP[uri];
     assert(path != null);
+    path = provider.convertPath(path);
     String content = provider.getFile(path).readAsStringSync();
     String newContent = updateContent(content);
     provider.updateFile(path, newContent);
   }
 }
 
 class _MockSdkLibrary implements SdkLibrary {
   final String shortName;
   final String path;
   final String content;
@@ skipping 34 matching lines @@
 
   @override
   AnalysisCache createCacheFromSourceFactory(SourceFactory factory) {
     if (factory == null) {
       return super.createCacheFromSourceFactory(factory);
     }
     return new AnalysisCache(
         <CachePartition>[AnalysisEngine.instance.partitionManager.forSdk(sdk)]);
   }
 }