Revert 45783

sdk/lib/developer/developer.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// ## Status: Unstable
 ///
 /// The dart:developer library is unstable and its API might change slightly
 /// as a result of developer feedback. This library is platform dependent and
 /// therefore it has implementations for both dart2js and the Dart VM. Both are
 /// under development and may not support all operations yet.
 ///
 library dart.developer;
 
-import 'dart:convert';
-
-part 'profiler.dart';
-
 /// 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.
 external bool debugger({bool when: true, String msg});
 
 /// Send a reference to [object] to any attached debuggers so they may open an
 /// inspector on the object. Returns the argument.
 external inspect(object);