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

site/try/src/interaction_manager.dart

 // Copyright (c) 2014, 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 trydart.interaction_manager;
 
 import 'dart:html';
 
 import 'dart:convert' show
     JSON;
 
 import 'dart:math' show
     max,
     min;
 
 import 'dart:async' show
     Completer,
     Future,
     Timer;
 
 import 'dart:collection' show
     Queue;
 
-import 'package:compiler/src/scanner/scannerlib.dart' show
+import 'package:compiler/implementation/scanner/scannerlib.dart' show
     BeginGroupToken,
     EOF_TOKEN,
     ErrorToken,
     STRING_INTERPOLATION_IDENTIFIER_TOKEN,
     STRING_INTERPOLATION_TOKEN,
     STRING_TOKEN,
     StringScanner,
     Token,
     UnmatchedToken,
     UnterminatedToken;
 
-import 'package:compiler/src/source_file.dart' show
+import 'package:compiler/implementation/source_file.dart' show
     StringSourceFile;
 
-import 'package:compiler/src/string_validator.dart' show
+import 'package:compiler/implementation/string_validator.dart' show
     StringValidator;
 
-import 'package:compiler/src/tree/tree.dart' show
+import 'package:compiler/implementation/tree/tree.dart' show
     StringQuoting;
 
 import 'compilation.dart' show
     currentSource,
     startCompilation;
 
 import 'ui.dart' show
     currentTheme,
     hackDiv,
     mainEditorPane,
@@ skipping 1289 matching lines @@
     token = token.next;
     kind = token.kind;
   }
   return token;
 }
 
 String extractQuote(String string) {
   StringQuoting q = StringValidator.quotingFromString(string);
   return (q.raw ? 'r' : '') + (q.quoteChar * q.leftQuoteLength);
 }