Position close buttons in bubbles based on a layout delegate constant.

ui/views/views_delegate.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_VIEWS_DELEGATE_H_
 #define UI_VIEWS_VIEWS_DELEGATE_H_
 
 #include <string>
 
 #if defined(OS_WIN)
@@ skipping 183 matching lines @@
 #endif
 
   // Returns a blocking pool task runner given a TaskRunnerType.
   virtual scoped_refptr<base::TaskRunner> GetBlockingPoolTaskRunner();
 
   // Returns the insets that should be applied around a DialogClientView. Note
   // that the top inset is used for the distance between the buttons and the
   // DialogClientView's content view.
   virtual gfx::Insets GetDialogButtonInsets() const;
 
+  // Returns the distance between a dialog's edge and the close button in the
+  // upper trailing corner.
+  virtual int GetDialogCloseButtonMargin() const;
+
   // Returns the spacing between a pair of related horizontal buttons, used for
   // dialog layout.
   virtual int GetDialogRelatedButtonHorizontalSpacing() const;
 
   // Returns the spacing between a pair of related vertical controls, used for
   // dialog layout.
   virtual int GetDialogRelatedControlVerticalSpacing() const;
 
   // Returns the insets that should be applied around a dialog's frame view.
   virtual gfx::Insets GetDialogFrameViewInsets() const;
@@ skipping 12 matching lines @@
 #endif
 
   NativeWidgetFactory native_widget_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewsDelegate);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_VIEWS_DELEGATE_H_