Remove DialogDelegate::UseNewStyle and unused code.

ui/views/controls/tabbed_pane/tabbed_pane_unittest.cc

Index: ui/views/controls/tabbed_pane/tabbed_pane_unittest.cc
diff --git a/ui/views/controls/tabbed_pane/tabbed_pane_unittest.cc b/ui/views/controls/tabbed_pane/tabbed_pane_unittest.cc
index b7281b26c627b83483bbfef0d237c94d7e26b5d9..f887a8d2ff487e1b10c0fa76a197df0510db551f 100644
--- a/ui/views/controls/tabbed_pane/tabbed_pane_unittest.cc
+++ b/ui/views/controls/tabbed_pane/tabbed_pane_unittest.cc
@@ -34,7 +34,7 @@ typedef ViewsTestBase TabbedPaneTest;
 
 // Tests TabbedPane::GetPreferredSize() and TabbedPane::Layout().
 TEST_F(TabbedPaneTest, SizeAndLayout) {
-  scoped_ptr<TabbedPane> tabbed_pane(new TabbedPane(false));
+  scoped_ptr<TabbedPane> tabbed_pane(new TabbedPane());
   View* child1 = new FixedSizeView(gfx::Size(20, 10));
   tabbed_pane->AddTab(ASCIIToUTF16("tab1"), child1);
   View* child2 = new FixedSizeView(gfx::Size(5, 5));
@@ -66,7 +66,7 @@ TEST_F(TabbedPaneTest, SizeAndLayout) {
 }
 
 TEST_F(TabbedPaneTest, AddAndSelect) {
-  scoped_ptr<TabbedPane> tabbed_pane(new TabbedPane(false));
+  scoped_ptr<TabbedPane> tabbed_pane(new TabbedPane());
   // Add several tabs; only the first should be a selected automatically.
   for (int i = 0; i < 3; ++i) {
     View* tab = new View();