Rename 'dart:debugger' to 'dart:developer'

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:dev library.
+
+import 'dart:_js_helper' show patch;
+import 'dart:_foreign_helper' show JS;
+
+/// Stop the program as if a breakpoint where hit at the following statement.
+/// 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()
+void breakHere() {
+  JS('', 'debugger');
+}
+
+/// If [expr] is true, stop the program as if a breakpoint where hit at the
+/// following statement. See [breakHere].
+@patch
+@ForceInline()
+void breakHereIf(bool expr) {
+  if (expr) {
+    breakHere();
+  }
+}