views: implement dialog width snapping

chrome/browser/ui/views/chrome_views_delegate.cc

Index: chrome/browser/ui/views/chrome_views_delegate.cc
diff --git a/chrome/browser/ui/views/chrome_views_delegate.cc b/chrome/browser/ui/views/chrome_views_delegate.cc
index 20793d9fc5e0ff082b4013cfcd6fbb4a45a30e1a..c97b519036fd9ed936af8ad4ee6b8fe676cb6705 100644
--- a/chrome/browser/ui/views/chrome_views_delegate.cc
+++ b/chrome/browser/ui/views/chrome_views_delegate.cc
@@ -258,6 +258,9 @@ int ChromeViewsDelegate::GetDistanceMetric(views::DistanceMetric metric) const {
     case views::DistanceMetric::BUTTON_HORIZONTAL_PADDING:
       return LayoutDelegate::Get()->GetMetric(
           LayoutDelegate::Metric::BUTTON_HORIZONTAL_PADDING);
+    case views::DistanceMetric::DIALOG_WIDTH_SNAPPING_UNIT:
+      return LayoutDelegate::Get()->GetMetric(
+          LayoutDelegate::Metric::DIALOG_WIDTH_SNAPPING_UNIT);
   }
   NOTREACHED();
   return 0;