Remove DialogDelegate::UseNewStyle and unused code.

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 ba891f4305578d059f0e8303b8bdb15878429cda..ae4d689f04008ea9bfa7c7c6dc204967a8adb888 100644
--- a/ui/views/window/dialog_delegate_unittest.cc
+++ b/ui/views/window/dialog_delegate_unittest.cc
@@ -204,9 +204,6 @@ TEST_F(DialogTest, RemoveDefaultButton) {
 }
 
 TEST_F(DialogTest, HitTest) {
-  if (!DialogDelegate::UseNewStyle())
-    return;
-
   // Ensure that the new style's BubbleFrameView hit-tests as expected.
   const NonClientView* view = dialog()->GetWidget()->non_client_view();
   BubbleFrameView* frame = static_cast<BubbleFrameView*>(view->frame_view());
@@ -232,9 +229,6 @@ TEST_F(DialogTest, HitTest) {
 }
 
 TEST_F(DialogTest, InitialBoundsAccommodateTitle) {
-  if (!DialogDelegate::UseNewStyle())
-    return;
-
   TestDialog* titled_dialog(new TestDialog());
   titled_dialog->set_title(ASCIIToUTF16("Title"));
   DialogDelegate::CreateDialogWidget(titled_dialog, GetContext(), NULL);