check all the dart code in the project, not just selected libraries

packages/flutter_tools/lib/src/artifacts.dart

@@ -45,7 +45,7 @@ class _ArtifactStore {
   }
 
   Future<String> getPath(Artifact artifact, String packageRoot) async {
-    String engineRevision = await _getEngineRevision(packageRoot); 
+    String engineRevision = await _getEngineRevision(packageRoot);
     Directory cacheDir = await _cacheDir(engineRevision, packageRoot);
 
     if (artifact == Artifact.FlutterCompiler) {

packages/flutter_tools/tool/travis.sh

@@ -8,10 +8,8 @@
 set -e
 
 # Verify that the libraries are error free.
-dartanalyzer --fatal-warnings \
-  bin/build_sky_apk.dart \
-  bin/sky_server.dart \
-  bin/sky_tools.dart
+pub global activate tuneup
+pub global run tuneup check
 
 # And run our tests.
 pub run test