Switch the defaults: strong mode is now default, but we stil check tests in Dart mode.

pkg/compiler/testing_dart.json

Index: pkg/compiler/testing_dart.json
diff --git a/pkg/compiler/testing_strong.json b/pkg/compiler/testing_dart.json
similarity index 74%
rename from pkg/compiler/testing_strong.json
rename to pkg/compiler/testing_dart.json
index ccebc09bf9407cfdb647e57da3de3b7c85ebec72..78152a31147374e59939ba5629647b6ed7634533 100644
--- a/pkg/compiler/testing_strong.json
+++ b/pkg/compiler/testing_dart.json
@@ -6,7 +6,7 @@
   "packages": "../../.packages",
 
   "analyze": {
-    "options": "analysis_options_strong.yaml",
+    "options": "analysis_options_dart.yaml",
 
     "uris": [
       ".",
@@ -50,7 +50,9 @@
       "^tests/compiler/dart2js/js_parser_statements_test\\.dart",
       "^tests/compiler/dart2js/js_spec_optimization_test\\.dart",
       "^tests/compiler/dart2js/jsinterop/world_test\\.dart",
+      "^tests/compiler/dart2js/kernel/class_hierarchy_test\\.dart",
       "^tests/compiler/dart2js/kernel/closed_world_test\\.dart",
+      "^tests/compiler/dart2js/kernel/visitor_test\\.dart",
       "^tests/compiler/dart2js/least_upper_bound_test\\.dart",
       "^tests/compiler/dart2js/library_resolution_test\\.dart",
       "^tests/compiler/dart2js/list_tracer2_test\\.dart",
@@ -89,6 +91,7 @@
       "^tests/compiler/dart2js/simple_inferrer_global_field_closure_test\\.dart",
       "^tests/compiler/dart2js/simple_inferrer_test\\.dart",
       "^tests/compiler/dart2js/size_test\\.dart",
+      "^tests/compiler/dart2js/source_map_validator_helper\\.dart",
       "^tests/compiler/dart2js/sourcemaps/data/invokes_test_file\\.dart",
       "^tests/compiler/dart2js/sourcemaps/diff_view\\.dart",
       "^tests/compiler/dart2js/sourcemaps/html_parts\\.dart",
@@ -98,6 +101,7 @@
       "^tests/compiler/dart2js/sourcemaps/output_structure\\.dart",
       "^tests/compiler/dart2js/sourcemaps/save\\.dart",
       "^tests/compiler/dart2js/sourcemaps/source_mapping_test_viewer\\.dart",
+      "^tests/compiler/dart2js/sourcemaps/sourcemap_helper\\.dart",
       "^tests/compiler/dart2js/sourcemaps/sourcemap_html_helper\\.dart",
       "^tests/compiler/dart2js/sourcemaps/stacktrace_test\\.dart",
       "^tests/compiler/dart2js/subtype_test\\.dart",
@@ -116,41 +120,6 @@
       "^tests/compiler/dart2js/type_variable_occurrence_test\\.dart",
       "^tests/compiler/dart2js/unused_empty_map_test\\.dart",
       "^tests/compiler/dart2js/world_test\\.dart",
-      "^tests/compiler/dart2js/analyze_dart2js_helpers_test\\.dart",
-      "^tests/compiler/dart2js/analyze_dart2js_test\\.dart",
-      "^tests/compiler/dart2js/analyze_helper\\.dart",
-      "^tests/compiler/dart2js/analyze_unused_dart2js_test\\.dart",
-      "^tests/compiler/dart2js/call_site_simple_type_inferer_test\\.dart",
-      "^tests/compiler/dart2js/class_set_test\\.dart",
-      "^tests/compiler/dart2js/const_exp_test\\.dart",
-      "^tests/compiler/dart2js/equivalence/check_functions\\.dart",
-      "^tests/compiler/dart2js/equivalence/check_helpers\\.dart",
-      "^tests/compiler/dart2js/field_type_simple_inferer_test\\.dart",
-      "^tests/compiler/dart2js/inference/data/super_set\\.dart",
-      "^tests/compiler/dart2js/inference/inference_test_helper\\.dart",
-      "^tests/compiler/dart2js/instantiated_classes_test\\.dart",
-      "^tests/compiler/dart2js/issue13354_test\\.dart",
-      "^tests/compiler/dart2js/kernel/closed_world2_test\\.dart",
-      "^tests/compiler/dart2js/kernel/closed_world_from_dill_test\\.dart",
-      "^tests/compiler/dart2js/kernel/compile_from_dill_test\\.dart",
-      "^tests/compiler/dart2js/kernel/test_helpers\\.dart",
-      "^tests/compiler/dart2js/mirror_private_name_inheritance_test\\.dart",
-      "^tests/compiler/dart2js/related_types\\.dart",
-      "^tests/compiler/dart2js/simple_inferrer_callers_test\\.dart",
-      "^tests/compiler/dart2js/simple_inferrer_const_closure3_test\\.dart",
-      "^tests/compiler/dart2js/simple_inferrer_const_closure4_test\\.dart",
-      "^tests/compiler/dart2js/simple_inferrer_const_closure5_test\\.dart",
-      "^tests/compiler/dart2js/simple_inferrer_final_field2_test\\.dart",
-      "^tests/compiler/dart2js/simple_inferrer_final_field3_test\\.dart",
-      "^tests/compiler/dart2js/simple_inferrer_final_field_test\\.dart",
-      "^tests/compiler/dart2js/simple_inferrer_global_field_closure2_test\\.dart",
-      "^tests/compiler/dart2js/simple_inferrer_postfix_prefix_test\\.dart",
-      "^tests/compiler/dart2js/simple_inferrer_unregister_call_test\\.dart",
-      "^tests/compiler/dart2js/source_map_name_test\\.dart",
-      "^tests/compiler/dart2js/source_mapping_test\\.dart",
-      "^tests/compiler/dart2js/type_combination_test\\.dart",
-      "^tests/compiler/dart2js/type_inference7_test\\.dart",
-      "^tests/compiler/dart2js/type_test_helper\\.dart",
 
       "^tests/compiler/dart2js/path with spaces/.*"
     ]