Add 'pattern' and 'maxResults' to getElementDeclarations() request.

R=brianwilkerson@google.com

Change-Id: I2094fa106cbdd7bc4eff9015d94b34517b3d50a5
Reviewed-on: https://dart-review.googlesource.com/42180
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>

pkg/analysis_server/tool/spec/generated/java/AnalysisServer.java

@@ -733,8 +733,13 @@ public interface AnalysisServer {
    * {@code search.getElementDeclarations}
    *
    * Return top-level and class member declarations.
+   *
+   * @param pattern The regular expression used to match the names of declarations. If this field is
+   *         missing, return all declarations.
+   * @param maxResults The maximum number of declarations to return. If this field is missing, return
+   *         all matching declarations.
    */
-  public void search_getElementDeclarations(GetElementDeclarationsConsumer consumer);
+  public void search_getElementDeclarations(String pattern, int maxResults, GetElementDeclarationsConsumer consumer);
 
   /**
    * {@code search.getTypeHierarchy}