Draw infobar arrow border with width of 1px on any scale factor.

chrome/browser/ui/views/infobars/infobar_view.h

Index: chrome/browser/ui/views/infobars/infobar_view.h
diff --git a/chrome/browser/ui/views/infobars/infobar_view.h b/chrome/browser/ui/views/infobars/infobar_view.h
index 0aba01c1554f6e60b390d700fe157fc09276a1b1..7e245fcefbd95bb3a9530e5f379e98ea8f6c7192 100644
--- a/chrome/browser/ui/views/infobars/infobar_view.h
+++ b/chrome/browser/ui/views/infobars/infobar_view.h
@@ -38,6 +38,8 @@ class InfoBarView : public infobars::InfoBar,
  public:
   explicit InfoBarView(scoped_ptr<infobars::InfoBarDelegate> delegate);
 
+  const infobars::InfoBarContainer::Delegate* container_delegate() const;
+  // TODO(estade): remove these when MD is default.
   const SkPath& fill_path() const { return fill_path_; }
   const SkPath& stroke_path() const { return stroke_path_; }
 
@@ -94,9 +96,6 @@ class InfoBarView : public infobars::InfoBar,
   // animate open and closed.
   int OffsetY(views::View* view) const;
 
-  // Convenience getter.
-  const infobars::InfoBarContainer::Delegate* container_delegate() const;
-
   // Shows a menu at the specified position.
   // NOTE: This must not be called if we're unowned.  (Subclasses should ignore
   // calls to RunMenu() in this case.)