Remove DialogDelegate::UseNewStyle and unused code.

ui/views/widget/widget.h

 // 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.
 
 #ifndef UI_VIEWS_WIDGET_WIDGET_H_
 #define UI_VIEWS_WIDGET_WIDGET_H_
 
 #include <set>
 #include <stack>
 #include <vector>
@@ skipping 236 matching lines @@
   static Widget* CreateWindowWithBounds(WidgetDelegate* delegate,
                                         const gfx::Rect& bounds);
 
   // Creates a decorated window Widget with the specified properties.
   static Widget* CreateWindowWithParent(WidgetDelegate* delegate,
                                         gfx::NativeWindow parent);
   static Widget* CreateWindowWithParentAndBounds(WidgetDelegate* delegate,
                                                  gfx::NativeWindow parent,
                                                  const gfx::Rect& bounds);
 
-  // Creates a decorated window Widget in the same desktop context as
-  // |context|.
+  // Creates a decorated window Widget in the same desktop context as |context|.
   static Widget* CreateWindowWithContext(WidgetDelegate* delegate,
                                          gfx::NativeView context);
   static Widget* CreateWindowWithContextAndBounds(WidgetDelegate* delegate,
                                                   gfx::NativeView context,
                                                   const gfx::Rect& bounds);
 
-  // Creates an undecorated child window Widget. |new_style_parent| is the
-  // parent to use for new style dialogs, |parent| for currently-styled dialogs.
-  //
-  // TODO(wittman): use a single parent parameter once we move fully to
-  // new-style dialogs.
+  // Creates an undecorated child window Widget parented to |parent|.
   static Widget* CreateWindowAsFramelessChild(WidgetDelegate* widget_delegate,
-                                              gfx::NativeView parent,
-                                              gfx::NativeView new_style_parent);
+                                              gfx::NativeView parent);
 
   // Enumerates all windows pertaining to us and notifies their
   // view hierarchies that the locale has changed.
   // TODO(beng): remove post-Aurafication of ChromeOS.
   static void NotifyLocaleChanged();
 
   // Closes all Widgets that aren't identified as "secondary widgets". Called
   // during application shutdown when the last non-secondary widget is closed.
   static void CloseAllSecondaryWidgets();
 
@@ skipping 610 matching lines @@
   // True when window movement via mouse interaction with the frame should be
   // disabled.
   bool movement_disabled_;
 
   DISALLOW_COPY_AND_ASSIGN(Widget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_WIDGET_H_