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

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/text/correction/QuickAssistProcessor.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/text/correction/QuickAssistProcessor.java
diff --git a/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/text/correction/QuickAssistProcessor.java b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/text/correction/QuickAssistProcessor.java
index a3e5b70028c6ecb01409a08e538c65372cbaa378..aad98541ebd1ff489c9eefc38b378e835e3e836e 100644
--- a/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/text/correction/QuickAssistProcessor.java
+++ b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/text/correction/QuickAssistProcessor.java
@@ -13,6 +13,10 @@
  */
 package com.google.dart.tools.ui.internal.text.correction;
 
+import static com.google.dart.tools.core.dom.PropertyDescriptorHelper.DART_BINARY_EXPRESSION_LEFT_OPERAND;
+import static com.google.dart.tools.core.dom.PropertyDescriptorHelper.DART_VARIABLE_NAME;
+import static com.google.dart.tools.core.dom.PropertyDescriptorHelper.getLocationInParent;
+
 import com.google.common.collect.Lists;
 import com.google.dart.compiler.ast.DartBinaryExpression;
 import com.google.dart.compiler.ast.DartBlock;
@@ -46,10 +50,6 @@ import com.google.dart.tools.ui.text.dart.IInvocationContext;
 import com.google.dart.tools.ui.text.dart.IProblemLocation;
 import com.google.dart.tools.ui.text.dart.IQuickAssistProcessor;
 
-import static com.google.dart.tools.core.dom.PropertyDescriptorHelper.DART_BINARY_EXPRESSION_LEFT_OPERAND;
-import static com.google.dart.tools.core.dom.PropertyDescriptorHelper.DART_VARIABLE_NAME;
-import static com.google.dart.tools.core.dom.PropertyDescriptorHelper.getLocationInParent;
-
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.text.edits.MultiTextEdit;
@@ -107,12 +107,12 @@ public class QuickAssistProcessor implements IQuickAssistProcessor {
     return true;
   }
 
-  private final List<ICommandAccess> proposals = Lists.newArrayList();
+  private CompilationUnit unit;
   private int selectionOffset;
   private int selectionLength;
-  private CompilationUnit unit;
   private ExtractUtils utils;
   private DartNode node;
+  private final List<ICommandAccess> proposals = Lists.newArrayList();
   private final List<TextEdit> textEdits = Lists.newArrayList();
 
   @Override