Quick fixes 'Create class' and 'Create constructor'

compiler/java/com/google/dart/compiler/resolver/ClassElementImplementation.java

Index: compiler/java/com/google/dart/compiler/resolver/ClassElementImplementation.java
diff --git a/compiler/java/com/google/dart/compiler/resolver/ClassElementImplementation.java b/compiler/java/com/google/dart/compiler/resolver/ClassElementImplementation.java
index e5ac5bbf0b2bcebfd115ec5c4550ed44851ae71a..ad75b526467366d99b568bd7445ee6da6edab6de 100644
--- a/compiler/java/com/google/dart/compiler/resolver/ClassElementImplementation.java
+++ b/compiler/java/com/google/dart/compiler/resolver/ClassElementImplementation.java
@@ -39,6 +39,8 @@ class ClassElementImplementation extends AbstractNodeElement implements ClassNod
   private final SourceInfo nameLocation;
   private final String declarationNameWithTypeParameter;
   private List<Element> unimplementedMembers;
+  private final int openBraceOffset;
+  private final int closeBraceOffset;
 
   // declared volatile for thread-safety
   @SuppressWarnings("unused")
@@ -67,12 +69,16 @@ class ClassElementImplementation extends AbstractNodeElement implements ClassNod
       modifiers = node.getModifiers();
       nameLocation = node.getName().getSourceInfo();
       declarationNameWithTypeParameter = createDeclarationName(node.getName(), node.getTypeParameters());
+      openBraceOffset = node.getOpenBraceOffset();
+      closeBraceOffset = node.getCloseBraceOffset();
     } else {
       isInterface = false;
       metadata = DartObsoleteMetadata.EMPTY;
       modifiers = Modifiers.NONE;
       nameLocation = SourceInfo.UNKNOWN;
       declarationNameWithTypeParameter = "";
+      openBraceOffset = -1;
+      closeBraceOffset = -1;
     }
   }
 
@@ -392,4 +398,14 @@ class ClassElementImplementation extends AbstractNodeElement implements ClassNod
   public void setUnimplementedMembers(List<Element> members) {
     this.unimplementedMembers = members;
   }
+  
+  @Override
+  public int getOpenBraceOffset() {
+    return openBraceOffset;
+  }
+  
+  @Override
+  public int getCloseBraceOffset() {
+    return closeBraceOffset;
+  }
 }