Ensure we're looking at the correct resolved AST when initializing fields in constructors.

pkg/compiler/lib/src/resolved_uri_translator.dart

Index: pkg/compiler/lib/src/resolved_uri_translator.dart
diff --git a/pkg/compiler/lib/src/resolved_uri_translator.dart b/pkg/compiler/lib/src/resolved_uri_translator.dart
index 84cdf501c6cb52fb9833379fa2c8e12e4af12e84..c90088c79158adb4d6f8aaa2076c840d8319b42d 100644
--- a/pkg/compiler/lib/src/resolved_uri_translator.dart
+++ b/pkg/compiler/lib/src/resolved_uri_translator.dart
@@ -115,6 +115,9 @@ class _ResolvedUriTranslator implements ResolvedUriTranslator {
       bool allowInternalLibraryAccess = importingLibrary != null &&
           (importingLibrary.isPlatformLibrary ||
               importingLibrary.isPatch ||
+              // The memory scheme is specifically for unit tests that use the
+              // in-memory compiler.
+              importingLibrary.canonicalUri.scheme == 'memory' ||
               importingLibrary.canonicalUri.path
                   .contains('sdk/tests/compiler/dart2js_native'));