sdk files reorganization to make dart2js a proper package

sdk/lib/_internal/compiler/js_lib/developer_patch.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.
-
-// Patch file for dart:developer library.
-
-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 msg}) {
-  if (when) {
-    JS('', 'debugger');
-  }
-  return when;
-}
-
-/// Send a reference to [object] to any attached debuggers so they may open an
-/// inspector on the object. Returns the argument.
-@patch
-inspect(object) {
-  return object;
-}