Broke out layout metric information from ViewsDelegate to LayoutProvider

ui/views/mus/aura_init.cc

Index: ui/views/mus/aura_init.cc
diff --git a/ui/views/mus/aura_init.cc b/ui/views/mus/aura_init.cc
index fe7406ccf782b713366af090c6bb3c01baa2a31f..7f73dc190f410c7ca759ac28be41f692f7b3c29e 100644
--- a/ui/views/mus/aura_init.cc
+++ b/ui/views/mus/aura_init.cc
@@ -19,6 +19,7 @@
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_paths.h"
+#include "ui/views/layout/layout_provider.h"
 #include "ui/views/mus/mus_client.h"
 #include "ui/views/style/typography_provider.h"
 #include "ui/views/views_delegate.h"
@@ -44,11 +45,7 @@ class MusViewsDelegate : public ViewsDelegate {
       Widget::InitParams* params,
       internal::NativeWidgetDelegate* delegate) override {}
 
-  const TypographyProvider& GetTypographyProvider() const override {
-    return typography_provider_;
-  }
-
-  DefaultTypographyProvider typography_provider_;
+  LayoutProvider layout_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(MusViewsDelegate);
 };