Emit to StreamCodeOutput instead of CodeBuffer.

pkg/compiler/lib/src/js/printer.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.
 
 part of js;
 
 class Printer extends Indentation implements NodeVisitor {
   final bool shouldCompressOutput;
   leg.Compiler compiler;
   CodeBuffer outBuffer;
@@ skipping 40 matching lines @@
   int get lastCharCode {
     if (lastAddedString == null) return 0;
     assert(lastAddedString.length != "");
     return lastAddedString.codeUnitAt(lastAddedString.length - 1);
   }
 
   void out(String str) {
     if (str != "") {
       if (pendingSemicolon) {
         if (!shouldCompressOutput) {
-          outBuffer.write(";");
+          outBuffer.add(";");
         } else if (str != "}") {
           // We want to output newline instead of semicolon because it makes
           // the raw stack traces much easier to read and it also makes line-
           // based tools like diff work much better.  JavaScript will
           // automatically insert the semicolon at the newline if it means a
           // parsing error is avoided, so we can only do this trick if the
           // next line is not something that can be glued onto a valid
           // expression to make a new valid expression.
 
           // If we're using the new emitter where most pretty printed code
           // is escaped in strings, it is a lot easier to deal with semicolons
           // than newlines because the former doesn't need escaping.
           if (USE_NEW_EMITTER || expressionContinuationRegExp.hasMatch(str)) {
-            outBuffer.write(";");
+            outBuffer.add(";");
           } else {
-            outBuffer.write("\n");
+            outBuffer.add("\n");
           }
         }
       }
       if (pendingSpace &&
           (!shouldCompressOutput || identifierCharacterRegExp.hasMatch(str))) {
-        outBuffer.write(" ");
+        outBuffer.add(" ");
       }
       pendingSpace = false;
       pendingSemicolon = false;
-      outBuffer.write(str);
+      outBuffer.add(str);
       lastAddedString = str;
     }
   }
 
   void outLn(String str) {
     out(str);
     lineOut();
   }
 
   void outSemicolonLn() {
@@ skipping 1070 matching lines @@
         codes.add(nthLetter((n ~/ nameSpaceSize) % LETTERS));
       }
       codes.add(charCodes.$0 + digit);
       newName = new String.fromCharCodes(codes);
     }
     assert(new RegExp(r'[a-zA-Z][a-zA-Z0-9]*').hasMatch(newName));
     maps.last[oldName] = newName;
     return newName;
   }
 }