Revert "Remove 'Element.docRange'."

pkg/analyzer/lib/dart/element/element.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Defines the element model. The element model describes the semantic (as
  * opposed to syntactic) structure of Dart code. The syntactic structure of the
  * code is modeled by the [AST structure](../ast/ast.dart).
  *
  * The element model consists of two closely related kinds of objects: elements
@@ skipping 572 matching lines @@
    * Return the display name of this element, or `null` if this element does not
    * have a name.
    *
    * In most cases the name and the display name are the same. Differences
    * though are cases such as setters where the name of some setter `set f(x)`
    * is `f=`, instead of `f`.
    */
   String get displayName;
 
   /**
+   * Return the source range of the documentation comment for this element,
+   * or `null` if this element does not or cannot have a documentation.
+   *
+   * Deprecated.  Use [documentationComment] instead.
+   */
+  @deprecated
+  SourceRange get docRange;
+
+  /**
    * Return the content of the documentation comment (including delimiters) for
    * this element, or `null` if this element does not or cannot have
    * documentation.
    */
   String get documentationComment;
 
   /**
    * Return the element that either physically or logically encloses this
    * element. This will be `null` if this element is a library because libraries
    * are the top-level elements in the model.
@@ skipping 1409 matching lines @@
   DartType get type;
 
   /**
    * Return a representation of the value of this variable, forcing the value
    * to be computed if it had not previously been computed, or `null` if either
    * this variable was not declared with the 'const' modifier or if the value of
    * this variable could not be computed because of errors.
    */
   DartObject computeConstantValue();
 }