Broke out layout metric information from ViewsDelegate to LayoutProvider

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 32665d8235f52b15598f1300110768df18cf4035..56d285c2f8036b57e0787aa28b721dd403ce4c6a 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 +9,7 @@
 
 #include "base/macros.h"
 #include "chrome/browser/chrome_browser_main_extra_parts.h"
+#include "ui/views/layout/views_layout_delegate.h"
 
 namespace ui {
 class InputDeviceClient;
@@ -45,6 +46,7 @@ class ChromeBrowserMainExtraPartsViews : public ChromeBrowserMainExtraParts {
 
  private:
   std::unique_ptr<views::ViewsDelegate> views_delegate_;
+  std::unique_ptr<views::ViewsLayoutDelegate> layout_delegate_;
 
 #if defined(USE_AURA)
   std::unique_ptr<wm::WMState> wm_state_;