Add ClassDeclaration/ClassTypeAlias.isAbstract() and use them.

editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/internal/local/computer/DartUnitOutlineComputer.java

 /*
  * Copyright (c) 2014, 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 135 matching lines @@
     }
     // not first child: [endOfPreviousSibling, endOfNode]
     int prevSiblingEnd = siblings.get(index - 1).getEnd();
     return new SourceRegionImpl(prevSiblingEnd, node.getEnd() - prevSiblingEnd);
   }
 
   private OutlineImpl newClassOutline(Outline unitOutline, List<Outline> unitChildren,
       ClassDeclaration classDeclaration) {
     SimpleIdentifier nameNode = classDeclaration.getName();
     String name = nameNode.getName();
-    // TODO(scheglov) add ClassDeclaration.isAbstract()
     OutlineImpl outline = new OutlineImpl(
         unitOutline,
         getSourceRegion(classDeclaration),
         OutlineKind.CLASS,
         name,
         nameNode.getOffset(),
         name.length(),
         null,
         null,
-        classDeclaration.getAbstractKeyword() != null,
+        classDeclaration.isAbstract(),
         false);
     unitChildren.add(outline);
     return outline;
   }
 
   private void newClassTypeAlias(Outline unitOutline, List<Outline> unitChildren,
       ClassTypeAlias alias) {
     SimpleIdentifier nameNode = alias.getName();
-    // TODO(scheglov) add ClassTypeAlias.isAbstract()
     unitChildren.add(new OutlineImpl(
         unitOutline,
         getSourceRegion(alias),
         OutlineKind.CLASS_TYPE_ALIAS,
         nameNode.getName(),
         nameNode.getOffset(),
         nameNode.getLength(),
         null,
         null,
-        alias.getAbstractKeyword() != null,
+        alias.isAbstract(),
         false));
   }
 
   private void newConstructorOutline(OutlineImpl classOutline, List<Outline> children,
       ConstructorDeclaration constructorDeclaration) {
     Identifier returnType = constructorDeclaration.getReturnType();
     String name = returnType.getName();
     int offset = returnType.getOffset();
     int length = returnType.getLength();
     SimpleIdentifier constructorNameNode = constructorDeclaration.getName();
@@ skipping 116 matching lines @@
         OutlineKind.COMPILATION_UNIT,
         null,
         0,
         0,
         null,
         null,
         false,
         false);
   }
 }