Roll to pickup pool changes

packages/package_config/lib/discovery_analysis.dart

Index: packages/package_config/lib/discovery_analysis.dart
diff --git a/packages/package_config/lib/discovery_analysis.dart b/packages/package_config/lib/discovery_analysis.dart
index ce7e98a1ac813837c20d71211339651970223109..67798e129e3ac4f05c501d4d48ad7e7af261543c 100644
--- a/packages/package_config/lib/discovery_analysis.dart
+++ b/packages/package_config/lib/discovery_analysis.dart
@@ -91,6 +91,7 @@ abstract class PackageContext {
         contexts = oldContexts;
       }
     }
+
     findRoots(directory);
     // If the root is not itself context root, add a the wrapper context.
     if (contexts.length == 1 && contexts[0].directory == directory) {
@@ -115,6 +116,7 @@ class _PackageContext implements PackageContext {
         recurse(child);
       }
     }
+
     recurse(this);
     return result;
   }