MacViews: Fix ViewTest.HandleAccelerator by faking window activation

ui/views/window/dialog_delegate_unittest.cc

Index: ui/views/window/dialog_delegate_unittest.cc
diff --git a/ui/views/window/dialog_delegate_unittest.cc b/ui/views/window/dialog_delegate_unittest.cc
index 124e0e49996d2d0ea6a7151afba52c8b6d1b6faf..1dd4f0134022c4417f1209b1b70f4fa2f5cd3b37 100644
--- a/ui/views/window/dialog_delegate_unittest.cc
+++ b/ui/views/window/dialog_delegate_unittest.cc
@@ -18,10 +18,6 @@
 #include "ui/views/window/dialog_client_view.h"
 #include "ui/views/window/dialog_delegate.h"
 
-#if defined(OS_MACOSX)
-#include "ui/base/test/scoped_fake_nswindow_focus.h"
-#endif
-
 namespace views {
 
 namespace {
@@ -103,6 +99,7 @@ class DialogTest : public ViewsTestBase {
 
   void SetUp() override {
     ViewsTestBase::SetUp();
+    EnableMacFakeWindowActivation();
     dialog_ = new TestDialog();
     DialogDelegate::CreateDialogWidget(dialog_, GetContext(), NULL)->Show();
   }
@@ -123,12 +120,6 @@ class DialogTest : public ViewsTestBase {
  private:
   TestDialog* dialog_;
 
-#if defined(OS_MACOSX)
-  // Causes Widget::Show() to transfer focus synchronously and become immune to
-  // losing focus to processes running in parallel.
-  ui::test::ScopedFakeNSWindowFocus fake_focus;
-#endif
-
   DISALLOW_COPY_AND_ASSIGN(DialogTest);
 };