MacViews: Overlay Scrollbars with Show/Hide Animations

ui/views/style/platform_style_mac.mm

Index: ui/views/style/platform_style_mac.mm
diff --git a/ui/views/style/platform_style_mac.cc b/ui/views/style/platform_style_mac.mm
similarity index 77%
rename from ui/views/style/platform_style_mac.cc
rename to ui/views/style/platform_style_mac.mm
index f1038d87842aeeea13a344d82c013f46914ee84a..44254ea9a7d3f6e45e2caad7296d88ffa49ec52c 100644
--- a/ui/views/style/platform_style_mac.cc
+++ b/ui/views/style/platform_style_mac.mm
@@ -6,6 +6,7 @@
 
 #include "ui/views/controls/button/label_button.h"
 #include "ui/views/controls/button/label_button_border.h"
+#import "ui/views/controls/scrollbar/cocoa_scroll_bar.h"
 #include "ui/views/style/mac/dialog_button_border_mac.h"
 
 namespace views {
@@ -19,4 +20,9 @@ scoped_ptr<LabelButtonBorder> PlatformStyle::CreateLabelButtonBorder(
   return make_scoped_ptr(new LabelButtonAssetBorder(style));
 }
 
+// static
+scoped_ptr<ScrollBar> PlatformStyle::CreateScrollBar(bool is_horizontal) {
+  return make_scoped_ptr(new CocoaScrollBar(is_horizontal));
+}
+
 }  // namespace views