Show errors reported for invalid setBreakpoint calls.

editor/tools/plugins/com.google.dart.tools.debug.core/src/com/google/dart/tools/debug/core/server/ServerDebugTarget.java

 /*
  * Copyright (c) 2012, the Dart project authors.
  * 
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  * 
  * http://www.eclipse.org/legal/epl-v10.html
  * 
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
@@ skipping 378 matching lines @@
   public void suspend() throws DebugException {
 
   }
 
   @Override
   public void terminate() throws DebugException {
     process.terminate();
   }
 
   public void writeToStdout(String message) {
-    //TODO(keertip): implement printing messages to console
-    // process.getStreamMonitor().messageAdded(message);
+    fireStreamAppended(message + "\n");
   }
 
   protected ServerDebugThread findThread(VmIsolate isolate) {
     for (ServerDebugThread thread : threads) {
       if (thread.getIsolate().getId() == isolate.getId()) {
         return thread;
       }
     }
 
     return null;
@@ skipping 138 matching lines @@
   }
 
   private void sleep(int millis) {
     try {
       Thread.sleep(millis);
     } catch (Exception exception) {
     }
   }
 
 }