Move yet more from WmShell to Shell

ash/test/shell_test_api.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/test/shell_test_api.h"
+
 #include "ash/common/palette_delegate.h"
 #include "ash/common/session/session_state_delegate.h"
+#include "ash/common/shelf/shelf_delegate.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 
 namespace ash {
 namespace test {
 
 ShellTestApi::ShellTestApi() : ShellTestApi(Shell::GetInstance()) {}
 
 ShellTestApi::ShellTestApi(Shell* shell) : shell_(shell) {}
 
@@ skipping 20 matching lines @@
 void ShellTestApi::SetPaletteDelegate(
     std::unique_ptr<PaletteDelegate> palette_delegate) {
   shell_->palette_delegate_ = std::move(palette_delegate);
 }
 
 void ShellTestApi::SetSessionStateDelegate(
     SessionStateDelegate* session_state_delegate) {
   shell_->session_state_delegate_.reset(session_state_delegate);
 }
 
+void ShellTestApi::SetShelfDelegate(
+    std::unique_ptr<ShelfDelegate> test_delegate) {
+  shell_->shelf_delegate_ = std::move(test_delegate);
+}
+
 }  // namespace test
 }  // namespace ash