Fix dart/tools directory to remove @'raw string' and foo.dynamic.

tools/ddbg.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.
 
 // Simple interactive debugger shell that connects to the Dart VM's debugger
 // connection port.
 
 #import("dart:io");
 #import("dart:json");
 #import("dart:math", prefix: "Math");
@@ skipping 437 matching lines @@
       if (char != " " && char != "\n" && char != "\r" && char != "\t") break;
       index++;
     }
     return index;
   }
   int skipString(int index) {
     assert(string[index - 1] == '"');
     while (index < string.length) {
       String char = string[index];
       if (char == '"') return index + 1;
-      if (char == @'\') index++;
+      if (char == r'\') index++;
       if (index == string.length) return index;
       index++;
     }
     return index;
   }
   int index = 0;
   index = skipWhitespace(index);
   // Bail out if the first non-whitespace character isn't '{'.
   if (index == string.length || string[index] != '{') return 0;
   int nexting = 0;
@@ skipping 28 matching lines @@
   };
   vmInStream.onError = (err) {
     print("Error in debug connection: $err");
     quitShell();
   };
   vmInStream.onClosed = () {
     print("VM debugger connection closed");
     quitShell();
   };
 }