Isse 25404. When remove a method during inlining, remove also leading empty lines.

pkg/analysis_server/test/services/refactoring/inline_method_test.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.
 
 library test.services.refactoring.inline_method;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart' hide Element;
 import 'package:analysis_server/src/services/correction/status.dart';
@@ skipping 1255 matching lines @@
     return _assertSuccessfulRefactoring(r'''
 main() {
   print((a, b) {
     print(a);
     print(b);
   });
 }
 ''');
   }
 
+  test_removeEmptyLinesBefore_method() {
+    indexTestUnit(r'''
+class A {
+  before() {
+  }
+
+
+  test() {
+    print(0);
+  }
+
+  foo() {
+    test();
+  }
+}
+''');
+    _createRefactoring('test() {');
+    // validate change
+    return _assertSuccessfulRefactoring(r'''
+class A {
+  before() {
+  }
+
+  foo() {
+    print(0);
+  }
+}
+''');
+  }
+
   test_setter_classMember_instance() {
     indexTestUnit(r'''
 class A {
   int f;
   void set result(x) {
     f = x + 1;
   }
 }
 main(A a) {
   a.result = 5;
@@ skipping 204 matching lines @@
     SourceChange change = await refactoring.createChange();
     this.refactoringChange = change;
     assertTestChangeResult(expectedCode);
   }
 
   void _createRefactoring(String search) {
     int offset = findOffset(search);
     refactoring = new InlineMethodRefactoring(searchEngine, testUnit, offset);
   }
 }