Show progress on upload and resolve.

sdk/lib/_internal/pub/lib/src/solver/version_solver.dart

Index: sdk/lib/_internal/pub/lib/src/solver/version_solver.dart
diff --git a/sdk/lib/_internal/pub/lib/src/solver/version_solver.dart b/sdk/lib/_internal/pub/lib/src/solver/version_solver.dart
index e2b7b5bf0598ec0f3eb66e57d91a428ec101b39d..9a98698e8a10a67f7effb61366777bd21e02e3a8 100644
--- a/sdk/lib/_internal/pub/lib/src/solver/version_solver.dart
+++ b/sdk/lib/_internal/pub/lib/src/solver/version_solver.dart
@@ -27,12 +27,12 @@ import 'backtracking_solver.dart';
 /// packages.
 Future<SolveResult> resolveVersions(SourceRegistry sources, Package root,
     {LockFile lockFile, List<String> useLatest}) {
-  log.message('Resolving dependencies...');
-
   if (lockFile == null) lockFile = new LockFile.empty();
   if (useLatest == null) useLatest = [];
 
-  return new BacktrackingSolver(sources, root, lockFile, useLatest).solve();
+  return log.progress('Resolving dependencies', () {
+    return new BacktrackingSolver(sources, root, lockFile, useLatest).solve();
+  });
 }
 
 /// The result of a version resolution.