Use a separate request for 'Sort members' feature, not a refactoring.

pkg/analysis_server/tool/spec/spec_input.html

Index: pkg/analysis_server/tool/spec/spec_input.html
diff --git a/pkg/analysis_server/tool/spec/spec_input.html b/pkg/analysis_server/tool/spec/spec_input.html
index 3cee950729c8fc7f5fb09276987ae128e729242e..107df36aa18d9c4795c9902acc1f4b53450737bb 100644
--- a/pkg/analysis_server/tool/spec/spec_input.html
+++ b/pkg/analysis_server/tool/spec/spec_input.html
@@ -1285,6 +1285,29 @@
           </field>
         </result>
       </request>
+      <request method="sortMembers">
+        <p>
+          Sort all of the directives, unit and class members
+          of the given Dart file.
+        </p>

[Paul Berry, 2014/09/26 16:23:53]

Do we need to include documentation of what happens in the event of an error?
(E.g. what happens if a file is specified that doesn't exist?  Can parse or scan
errors ever prevent the sort from succeeding?)

[scheglov, 2014/09/26 16:44:43]

https://codereview.chromium.org/604333002

+        <params>
+          <field name="file">
+            <ref>FilePath</ref>
+            <p>
+              The Dart file to sort.
+            </p>
+          </field>
+        </params>
+        <result>
+          <field name="edit">
+            <ref>SourceFileEdit</ref>
+            <p>
+              The file edit that is to be applied to the given file to effect
+              the sorting.
+            </p>
+          </field>
+        </result>
+      </request>
     </domain>
     <domain name="execution">
       <p>
@@ -3335,16 +3358,6 @@
           </field>
         </options>
       </refactoring>
-      <refactoring kind=SORT_MEMBERS>
-        <p>
-          Sort all of the directives, unit and class members
-          of the given Dart file.
-        </p>
-        <p>
-          The "offset" and "length" fields from the request are ignored, but the
-          file specified in the request specifies the file to be sorted.
-        </p>
-      </refactoring>
     </refactorings>
     <h2>Errors</h2>
     <p>