Revert "Change `msg` to `message` in debugger function."

sdk/lib/_internal/js_runtime/lib/developer_patch.dart

Index: sdk/lib/_internal/js_runtime/lib/developer_patch.dart
diff --git a/sdk/lib/_internal/js_runtime/lib/developer_patch.dart b/sdk/lib/_internal/js_runtime/lib/developer_patch.dart
index b316f250c9e9a7bf1f5e9601d005fe3fca19aed4..8ec8d4380b611354f109d32478094708f3ad8cea 100644
--- a/sdk/lib/_internal/js_runtime/lib/developer_patch.dart
+++ b/sdk/lib/_internal/js_runtime/lib/developer_patch.dart
@@ -17,7 +17,7 @@ import 'dart:_foreign_helper' show JS;
 /// that does.
 @patch
 @ForceInline()
-bool debugger({bool when: true, String message}) {
+bool debugger({bool when: true, String msg}) {
   if (when) {
     JS('', 'debugger');
   }
@@ -27,7 +27,7 @@ bool debugger({bool when: true, String message}) {
 /// Send a reference to [object] to any attached debuggers so they may open an
 /// inspector on the object. Returns the argument.
 @patch
-Object inspect(Object object) {
+inspect(object) {
   return object;
 }
 
@@ -50,4 +50,4 @@ log({int sequenceNumber,
      Object error,
      StackTrace stackTrace}) {
   // TODO.
-}
+}