Move dart2js from sdk/lib/_internal/compiler to pkg/compiler

pkg/compiler/lib/src/colors.dart

 // Copyright (c) 2012, 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.
 
 library colors;
 
 // See http://en.wikipedia.org/wiki/ANSI_escape_code#CSI_codes
 const String RESET = '\u001b[0m';
 
 // See http://en.wikipedia.org/wiki/ANSI_escape_code#Colors
 const String BLACK_COLOR = '\u001b[30m';
 const String RED_COLOR = '\u001b[31m';
 const String GREEN_COLOR = '\u001b[32m';
 const String YELLOW_COLOR = '\u001b[33m';
 const String BLUE_COLOR = '\u001b[34m';
 const String MAGENTA_COLOR = '\u001b[35m';
 const String CYAN_COLOR = '\u001b[36m';
 const String WHITE_COLOR = '\u001b[37m';
 
 String wrap(String string, String color) => "${color}$string${RESET}";
 
 String black(String string) => wrap(string, BLACK_COLOR);
 String red(String string) => wrap(string, RED_COLOR);
 String green(String string) => wrap(string, GREEN_COLOR);
 String yellow(String string) => wrap(string, YELLOW_COLOR);
 String blue(String string) => wrap(string, BLUE_COLOR);
 String magenta(String string) => wrap(string, MAGENTA_COLOR);
 String cyan(String string) => wrap(string, CYAN_COLOR);
 String white(String string) => wrap(string, WHITE_COLOR);