Make dart:developer log more user friendly

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..4f06174d37d9bd48c068ef01b304081045dec19e 100644
--- a/sdk/lib/_internal/js_runtime/lib/developer_patch.dart
+++ b/sdk/lib/_internal/js_runtime/lib/developer_patch.dart
@@ -7,14 +7,6 @@
 import 'dart:_js_helper' show patch;
 import 'dart:_foreign_helper' show JS;
 
-/// If [when] is true, stop the program as if a breakpoint where hit at the
-/// following statement. Returns the value of [when]. Some debuggers may
-/// display [msg].
-/// NOTE: When invoked, the isolate will not return until a debugger
-/// continues execution. When running in the Dart VM the behaviour is the same
-/// regardless of whether or not a debugger is connected. When compiled to
-/// JavaScript, this uses the "debugger" statement, and behaves exactly as
-/// that does.
 @patch
 @ForceInline()
 bool debugger({bool when: true, String message}) {
@@ -24,28 +16,17 @@ bool debugger({bool when: true, String message}) {
   return when;
 }
 
-/// 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) {
   return object;
 }
 
 @patch
-/// Emit a log event.
-/// [sequenceNumber] is a monotonically increasing sequence number.
-/// [millisececondsSinceEpoch] is a timestamp.
-/// [level] is the severity level (value between 0 and 2000 inclusive).
-/// [name] is the name of the source of the log message.
-/// [message] is the log message.
-/// [zone] (optional) the zone where the log was emitted
-/// [error] (optional) an error object associated with this log event.
-/// [stackTrace] (optional) a stack trace associated with this log event.
-log({int sequenceNumber,
-     int millisecondsSinceEpoch,
-     int level,
-     String name,
-     String message,
+log(String message,
+    {DateTime time,
+     int sequenceNumber,
+     int level: 0,
+     String name: '',
      Zone zone,
      Object error,
      StackTrace stackTrace}) {