Removes code using mus client lib

ui/views/accessible_pane_view_unittest.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 "ui/views/accessible_pane_view.h"
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "ui/base/accelerators/accelerator.h"
 #include "ui/views/controls/button/label_button.h"
@@ skipping 119 matching lines @@
   widget_bar->Activate();
 
   // Set pane focus succeeds, focus on child.
   EXPECT_TRUE(test_view_bar->SetPaneFocusAndFocusDefault());
   EXPECT_FALSE(test_view_main->HasFocus());
   EXPECT_FALSE(widget_main->IsActive());
   EXPECT_EQ(test_view_bar, test_view_bar->GetPaneFocusTraversable());
   EXPECT_EQ(test_view_bar->child_button(),
             test_view_bar->GetWidget()->GetFocusManager()->GetFocusedView());
 
-  if (!IsMus() && !IsAuraMusClient()) {
+  if (!IsMus()) {
     // Deactivate() is only reliable on Ash. On Windows it uses
     // ::GetNextWindow() to simply activate another window, and which one is not
     // predictable. On Mac, Deactivate() is not implemented. Note that
     // TestBarView calls set_allow_deactivate_on_esc(true), which is only
     // otherwise used in Ash.
 #if !defined(OS_MACOSX) || defined(USE_ASH)
     // Esc should deactivate the widget.
     test_view_bar->AcceleratorPressed(test_view_bar->escape_key());
     EXPECT_TRUE(widget_main->IsActive());
     EXPECT_FALSE(widget_bar->IsActive());
@@ skipping 77 matching lines @@
             test_view->GetWidget()->GetFocusManager()->GetFocusedView());
 
   // ESC
   test_view->AcceleratorPressed(test_view->escape_key());
   EXPECT_EQ(original_test_view->third_child_button(),
             test_view->GetWidget()->GetFocusManager()->GetFocusedView());
   widget->CloseNow();
   widget.reset();
 }
 }  // namespace views