Remove DialogDelegate::UseNewStyle and unused code.

ui/views/controls/tabbed_pane/tabbed_pane.cc

Index: ui/views/controls/tabbed_pane/tabbed_pane.cc
diff --git a/ui/views/controls/tabbed_pane/tabbed_pane.cc b/ui/views/controls/tabbed_pane/tabbed_pane.cc
index c3282634fca54a92b63788d4bd762801652557b2..aa46af6e445551f0a8e7d91455ac65506cf71ce0 100644
--- a/ui/views/controls/tabbed_pane/tabbed_pane.cc
+++ b/ui/views/controls/tabbed_pane/tabbed_pane.cc
@@ -233,7 +233,7 @@ void TabStrip::OnPaint(gfx::Canvas* canvas) {
   }
 }
 
-TabbedPane::TabbedPane(bool draw_border)
+TabbedPane::TabbedPane()
   : listener_(NULL),
     tab_strip_(new TabStrip(this)),
     contents_(new View()),
@@ -241,13 +241,6 @@ TabbedPane::TabbedPane(bool draw_border)
   set_focusable(true);
   AddChildView(tab_strip_);
   AddChildView(contents_);
-  if (draw_border) {
-    contents_->set_border(Border::CreateSolidSidedBorder(0,
-                                                         kTabBorderThickness,
-                                                         kTabBorderThickness,
-                                                         kTabBorderThickness,
-                                                         kTabBorderColor));
-  }
 }
 
 TabbedPane::~TabbedPane() {}