Analysis server format service wiring (and protocol doc update).

pkg/analysis_server/lib/src/protocol.dart

Index: pkg/analysis_server/lib/src/protocol.dart
===================================================================
--- pkg/analysis_server/lib/src/protocol.dart	(revision 42834)
+++ pkg/analysis_server/lib/src/protocol.dart	(working copy)
@@ -718,6 +718,17 @@
 
   /**
    * Initialize a newly created instance to represent the
+   * FORMAT_INVALID_FILE error condition.
+   */
+  Response.formatInvalidFile(Request request)
+      : this(
+          request.id,
+          error: new RequestError(
+              RequestErrorCode.FORMAT_INVALID_FILE,
+              'Error during `edit.format`: invalid file.'));
+
+  /**
+   * Initialize a newly created instance to represent the
    * GET_ERRORS_INVALID_FILE error condition.
    */
   Response.getErrorsInvalidFile(Request request)