Migrate CollectedCookiesViews to Chrome style.

ui/views/window/dialog_delegate.h

Index: ui/views/window/dialog_delegate.h
diff --git a/ui/views/window/dialog_delegate.h b/ui/views/window/dialog_delegate.h
index 59319c0b85c8925bd5f5d650e2a840975a9f2e78..5b7df299c74457c2ff4095a7123ae3f86a10718a 100644
--- a/ui/views/window/dialog_delegate.h
+++ b/ui/views/window/dialog_delegate.h
@@ -62,6 +62,11 @@ class VIEWS_EXPORT DialogDelegate : public WidgetDelegate {
   // false, native style padding is used.
   virtual bool UseChromeStyle() const;
 
+  // Returns the margins for the bottom and sides of the buttons when chrome
+  // style is in use.
+  virtual void GetChromeStyleMargins(int* vertical_edge,
+                                     int* horizontal_edge) const;
+
   // Returns whether accelerators are enabled on the button. This is invoked
   // when an accelerator is pressed, not at construction time. This
   // returns true.