Roll Dart to ef720983530e04819b6fda0659ed7a3fdb190060. (#6212)

DEPS

@@ -31,7 +31,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/master/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': 'cd9a42239f76e110dd73aeaac4c69a057a76ddf1',
+  'dart_revision': 'ef720983530e04819b6fda0659ed7a3fdb190060',
 
   'dart_args_tag': '1.4.4',
   'dart_async_tag': '2.0.8',

ci/licenses_golden/licenses_third_party

-Signature: fbcaf0eca04aa4bfacf6dcc71a919be3
+Signature: 7e3e1daeb388f5b96234b99e29bf6711
 
 UNUSED LICENSES:
 

lib/snapshot/BUILD.gn

@@ -86,6 +86,12 @@ action("generate_snapshot_bin") {
     "--await_is_keyword",
     "--vm_flag",
     "--enable_mirrors=false",
+    "--vm_flag",
+    "--no-strong",
+    "--vm_flag",
+    "--no-sync-async",
+    "--vm_flag",
+    "--no-reify-generic-functions",
     "--vm_output_bin",
     rebase_path(vm_snapshot_data, root_build_dir),
     "--vm_instructions_output_bin",
@@ -289,6 +295,9 @@ template("generate_entry_points_json_with_gen_snapshot") {
       output,
     ]
     args = [
+      "--no-strong",
+      "--no-sync-async",
+      "--no-reify-generic-functions",
       "--print-precompiler-entry-points=" + rebase_path(output),
       "--snapshot-kind=app-aot-blobs",
       "--vm_snapshot_data=" + rebase_path("$target_gen_dir/dummy.vm_data.snapshot"),

runtime/dart_vm.cc

@@ -92,7 +92,15 @@ static const char* kDartCheckedModeArgs[] = {
     // clang-format on
 };
 
-static const char* kDartStrongModeArgs[] = {
+static const char* kDartModeArgs[] = {
+    // clang-format off
+    "--no-strong",
+    "--no-reify_generic_functions",
+    "--no-sync_async",
+    // clang-format on
+};
+
+static const char* kDart2ModeArgs[] = {
     // clang-format off
     "--strong",
     "--reify_generic_functions",
@@ -381,16 +389,19 @@ DartVM::DartVM(const Settings& settings,
                  << isolate_snapshot_is_dart_2;
 
   if (is_preview_dart2) {
-    PushBackAll(&args, kDartStrongModeArgs, arraysize(kDartStrongModeArgs));
+    PushBackAll(&args, kDart2ModeArgs, arraysize(kDart2ModeArgs));
     if (use_checked_mode) {
       PushBackAll(&args, kDartAssertArgs, arraysize(kDartAssertArgs));
     }
-  } else if (use_checked_mode) {
-    FML_DLOG(INFO) << "Checked mode is ON";
-    PushBackAll(&args, kDartAssertArgs, arraysize(kDartAssertArgs));
-    PushBackAll(&args, kDartCheckedModeArgs, arraysize(kDartCheckedModeArgs));
   } else {
-    FML_DLOG(INFO) << "Is not Dart 2 and Checked mode is OFF";
+    PushBackAll(&args, kDartModeArgs, arraysize(kDartModeArgs));
+    if (use_checked_mode) {
+      FML_DLOG(INFO) << "Checked mode is ON";
+      PushBackAll(&args, kDartAssertArgs, arraysize(kDartAssertArgs));
+      PushBackAll(&args, kDartCheckedModeArgs, arraysize(kDartCheckedModeArgs));
+    } else {
+      FML_DLOG(INFO) << "Is not Dart 2 and Checked mode is OFF";
+    }
   }
 
   if (settings.start_paused) {