Rewire DDC to use the analyzer task model

test/codegen/expect/covariance.txt

Index: test/codegen/expect/covariance.txt
diff --git a/test/codegen/expect/covariance.txt b/test/codegen/expect/covariance.txt
index 4a6dd79b644c3393234e9a57fc5c721db7a2a6f0..c52c8e0c0838ec35b848158cf163031be462aa15 100644
--- a/test/codegen/expect/covariance.txt
+++ b/test/codegen/expect/covariance.txt
@@ -1 +1,7 @@
 // Messages from compiling covariance.dart
+warning: [MissingTypeError] type analysis didn't compute the type of: print SimpleIdentifier (test/codegen/covariance.dart, line 19, col 5)
+warning: [MissingTypeError] type analysis didn't compute the type of: add SimpleIdentifier (test/codegen/covariance.dart, line 20, col 11)
+warning: [MissingTypeError] type analysis didn't compute the type of: add SimpleIdentifier (test/codegen/covariance.dart, line 26, col 7)
+info: [DynamicInvoke] print('Bar.add got $x') requires dynamic invoke (test/codegen/covariance.dart, line 19, col 5)
+info: [DynamicInvoke] super.add(x) requires dynamic invoke (test/codegen/covariance.dart, line 20, col 5)
+info: [DynamicInvoke] foo.add('hi') requires dynamic invoke (test/codegen/covariance.dart, line 26, col 3)