Clarify some of the analysis server errors.

editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/RequestErrorCode.java

Index: editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/RequestErrorCode.java
diff --git a/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/RequestErrorCode.java b/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/RequestErrorCode.java
index 67079ef3e673635c04697583f90b03b4a5a284b0..c5203efa611321c61ba4344408e0312249b16da2 100644
--- a/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/RequestErrorCode.java
+++ b/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/RequestErrorCode.java
@@ -25,6 +25,8 @@ public class RequestErrorCode {
 
   /**
    * An error occurred during the processing of an "analysis.getErrors" request.
+   *
+   * This is a legacy error; it will be removed before the API reaches version 1.0.
    */
   public static final String GET_ERRORS_ERROR = "GET_ERRORS_ERROR";
 
@@ -40,11 +42,16 @@ public class RequestErrorCode {
 
   /**
    * The analysis server has already been started (and hence won't accept new connections).
+   *
+   * This error is included for future expansion; at present the analysis server can only speak to
+   * one client at a time so this error will never occur.
    */
   public static final String SERVER_ALREADY_STARTED = "SERVER_ALREADY_STARTED";
 
   /**
    * An "analysis.setPriorityFiles" request includes one or more files that are not being analyzed.
+   *
+   * This is a legacy error; it will be removed before the API reaches version 1.0.
    */
   public static final String UNANALYZED_PRIORITY_FILES = "UNANALYZED_PRIORITY_FILES";
 
@@ -56,6 +63,8 @@ public class RequestErrorCode {
 
   /**
    * The analysis server was requested to perform an action which is not supported.
+   *
+   * This is a legacy error; it will be removed before the API reaches version 1.0.
    */
   public static final String UNSUPPORTED_FEATURE = "UNSUPPORTED_FEATURE";