Checkpoint for more inheritance error codes 'Missing inherited member' warnings.

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/element/PropertyAccessorElementImpl.java

Index: editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/element/PropertyAccessorElementImpl.java
diff --git a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/element/PropertyAccessorElementImpl.java b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/element/PropertyAccessorElementImpl.java
index 8340bf0be09fe5d7c60929270c545c01bbbf672a..213ee910429de06045e57f787723f354084bb0f1 100644
--- a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/element/PropertyAccessorElementImpl.java
+++ b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/internal/element/PropertyAccessorElementImpl.java
@@ -90,6 +90,11 @@ public class PropertyAccessorElementImpl extends ExecutableElementImpl implement
   }
 
   @Override
+  public boolean isAbstract() {
+    return hasModifier(Modifier.ABSTRACT);
+  }
+
+  @Override
   public boolean isGetter() {
     return hasModifier(Modifier.GETTER);
   }
@@ -105,6 +110,15 @@ public class PropertyAccessorElementImpl extends ExecutableElementImpl implement
   }
 
   /**
+   * Set whether this accessor is abstract to correspond to the given value.
+   * 
+   * @param isAbstract {@code true} if the accessor is abstract
+   */
+  public void setAbstract(boolean isAbstract) {
+    setModifier(Modifier.ABSTRACT, isAbstract);
+  }
+
+  /**
    * Set whether this accessor is a getter to correspond to the given value.
    * 
    * @param isGetter {@code true} if the accessor is a getter