Basic 'Quick Fix' support and one fix as example/test

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

 <?xml version="1.0" encoding="UTF-8"?>
 <?eclipse version="3.4"?>
 <plugin>
 
    <extension-point id="dartElementFilters" name="%elementFiltersName" schema="schema/dartElementFilters.exsd"/>
    <extension-point id="dartEditorTextHovers" name="%javaEditorTextHoversName" schema="schema/dartEditorTextHovers.exsd"/>
    <extension-point id="dartDocCompletionProcessor" name="%javadocCompletionProcessor" schema="schema/dartDocCompletionProcessor.exsd"/>
    <extension-point id="quickFixProcessors" name="%quickFixProcessorExtensionPoint" schema="schema/quickFixProcessors.exsd"/>
    <extension-point id="quickAssistProcessors" name="%quickAssistProcessorExtensionPoint" schema="schema/quickAssistProcessors.exsd"/>
    <extension-point id="foldingStructureProviders" name="%foldingStructureProvidersExtensionPoint" schema="schema/foldingStructureProviders.exsd"/>
@@ skipping 523 matching lines @@
             defaultsTo="org.eclipse.jface.textfont"
             categoryId="com.google.dart.tools.ui.presentation"
             id="com.google.dart.tools.ui.editors.textfont.default">
          <description>
             %defaultEditorFontDefintion.description
          </description>
       </fontDefinition>
     </extension>
    
    
-   <extension
+    <extension
          point="org.eclipse.ui.editors.annotationTypes">
-      <type
-         name="com.google.dart.tools.ui.occurrences">
-      </type>
-      <type
-         name="com.google.dart.tools.ui.overrideIndicator">
-      </type>
-   </extension>
+        <type
+            name="com.google.dart.tools.ui.error"
+            super="org.eclipse.ui.workbench.texteditor.error"
+            markerType="com.google.dart.tools.core.problem"
+            markerSeverity="2"/>
+        <type
+            name="com.google.dart.tools.ui.warning"
+            super="org.eclipse.ui.workbench.texteditor.warning"
+            markerType="com.google.dart.tools.core.problem"
+            markerSeverity="1"/>
+        <type
+            name="com.google.dart.tools.ui.info"
+            super="org.eclipse.ui.workbench.texteditor.info"
+            markerType="com.google.dart.tools.core.problem"
+            markerSeverity="0"/>
+      <type name="com.google.dart.tools.ui.occurrences"/>
+      <type name="com.google.dart.tools.ui.overrideIndicator"/>
+    </extension>
+    
    <extension
          point="org.eclipse.ui.editors.markerAnnotationSpecification">
      <specification
             annotationType="com.google.dart.tools.ui.occurrences"
             label="%OccurrenceAnnotation.label"
             icon="$nl$/icons/full/obj16/searchm_obj.gif"
             textPreferenceKey="javaScriptOccurrenceIndication"
             textPreferenceValue="false"
             highlightPreferenceKey="javaScriptOccurrenceHighlighting"
             highlightPreferenceValue="true"
@@ skipping 2666 matching lines @@
             name="Remove resource references in Dart source">
             <enablement>
               <with variable="affectedNatures">
                 <iterate operator="or">
                   <equals value="com.google.dart.tools.core.dartNature"/>
                 </iterate>
               </with>
             </enablement>
       </deleteParticipant>
    </extension>
+
+    <extension
+        point="com.google.dart.tools.ui.quickFixProcessors">
+        <quickFixProcessor
+            name="%defaultQuickFixProcessor"
+            class="com.google.dart.tools.ui.internal.text.correction.QuickFixProcessor"
+            id="com.google.dart.tools.ui.internal.text.correction.QuickFixProcessor">
+        </quickFixProcessor>
+        <!--<quickFixProcessor
+            name="%spellingQuickFixProcessor"
+            class="org.eclipse.jdt.internal.ui.text.spelling.WordQuickFixProcessor"
+            id= "org.eclipse.jdt.ui.text.correction.spelling.QuickFixProcessor">
+            <handledMarkerTypes>
+                <markerType id="org.eclipse.jdt.ui.internal.spelling"/>
+            </handledMarkerTypes>
+        </quickFixProcessor>-->
+    </extension>
     
    <extension
          point="com.google.dart.tools.ui.quickAssistProcessors">
       <quickAssistProcessor
             class="com.google.dart.tools.ui.internal.text.correction.QuickAssistProcessor"
             id="com.google.dart.tools.ui.internal.text.correction.QuickAssistProcessor"/>
    </extension>
 
 </plugin>