delete launch configs when project is deleted

editor/tools/plugins/com.google.dart.tools.debug.ui/plugin.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <?eclipse version="3.4"?>
 <plugin>
     <extension
          point="org.eclipse.core.expressions.propertyTesters">
       <propertyTester
             class="com.google.dart.tools.debug.ui.launch.RunPropertyTester"
             id="com.google.dart.tools.debug.ui.run.propertyTester"
             namespace="com.google.dart.tools.debug.ui.launch"
             properties="canLaunch"
@@ skipping 412 matching lines @@
             schemeId="com.google.dart.tools.dartAcceleratorConfiguration"
             sequence="CTRL+D"
             platform="win32"/>
       <key
             commandId="org.eclipse.debug.ui.commands.eof"
             contextId="org.eclipse.debug.ui.console"
             schemeId="com.google.dart.tools.dartAcceleratorConfiguration"
             sequence="CTRL+Z"
             platform="win32"/ -->                                
     </extension>
+   <extension
+         point="org.eclipse.ltk.core.refactoring.deleteParticipants">
+      <deleteParticipant

[messick, 2012/04/23 18:36:42]

What happens when the file that defines the entry point for an application is
deleted?

[keertip, 2012/04/23 18:48:37]

The html file would still be opened in a browser, and there will be a message
indicating that the dart file could not be found.

On 2012/04/23 18:36:42, messick wrote:

+            class="com.google.dart.tools.debug.ui.launch.DeleteLaunchConfigsParticipant"
+            id="com.google.dart.tools.debug.ui.deleteParticipant.launch"
+            name="Delete Launch Configurations">
+         <enablement></enablement>
+      </deleteParticipant>
+   </extension>
    <!--extension
          point="org.eclipse.ui.actionSets">
       <actionSet
             id="com.google.dart.tools.debug.ui.runActionSet"
             label="Run actions"
             visible="true">
             <action
                class="com.google.dart.tools.debug.ui.launch.DartRunAction"
                definitionId="com.google.dart.tools.debug.ui.run.selection"
                id="com.google.dart.tools.debug.ui.run.selection.action"
@@ skipping 78 matching lines @@
                icon="icons/full/etool16/run_exc.gif"
                helpContextId="run_action_context"
                label="Run"
                style="pulldown">
          </action>
       </actionSet>
    </extension-->
 
 
 </plugin>