Refactor ViewsDelegate singleton

chrome/browser/ui/views/chrome_browser_main_extra_parts_views.h

Index: chrome/browser/ui/views/chrome_browser_main_extra_parts_views.h
diff --git a/chrome/browser/ui/views/chrome_browser_main_extra_parts_views.h b/chrome/browser/ui/views/chrome_browser_main_extra_parts_views.h
index 598a14c812cb1939b9de3dcb992a150fdb5eb21a..bd9afcc1076b69eef7b6e37a76ba1eb737f494fc 100644
--- a/chrome/browser/ui/views/chrome_browser_main_extra_parts_views.h
+++ b/chrome/browser/ui/views/chrome_browser_main_extra_parts_views.h
@@ -9,6 +9,10 @@
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chrome_browser_main_extra_parts.h"
 
+namespace views {
+class ViewsDelegate;
+}
+
 #if defined(USE_AURA)
 namespace wm {
 class WMState;
@@ -24,6 +28,8 @@ class ChromeBrowserMainExtraPartsViews : public ChromeBrowserMainExtraParts {
   void ToolkitInitialized() override;
 
  private:
+  scoped_ptr<views::ViewsDelegate> views_delegate_;
+
 #if defined(USE_AURA)
   scoped_ptr<wm::WMState> wm_state_;
 #endif