MacViews: Overlay Scrollbars with Show/Hide Animations

ui/views/views.gyp

Index: ui/views/views.gyp
diff --git a/ui/views/views.gyp b/ui/views/views.gyp
index f0675214c8502abbfc457508d506ba0634e970ac..d1d254e7d5515182a3d9a36d01744bce8cb67a9f 100644
--- a/ui/views/views.gyp
+++ b/ui/views/views.gyp
@@ -63,6 +63,8 @@
       'cocoa/tooltip_manager_mac.mm',
       'cocoa/views_nswindow_delegate.h',
       'cocoa/views_nswindow_delegate.mm',
+      'cocoa/views_scrollbar_bridge.h',
+      'cocoa/views_scrollbar_bridge.mm',
       'cocoa/widget_owner_nswindow_adapter.h',
       'cocoa/widget_owner_nswindow_adapter.mm',
       'color_chooser/color_chooser_listener.h',
@@ -174,6 +176,8 @@
       'controls/scrollbar/base_scroll_bar_button.h',
       'controls/scrollbar/base_scroll_bar_thumb.cc',
       'controls/scrollbar/base_scroll_bar_thumb.h',
+      'controls/scrollbar/cocoa_scroll_bar.h',
+      'controls/scrollbar/cocoa_scroll_bar.mm',
       'controls/scrollbar/native_scroll_bar.cc',
       'controls/scrollbar/native_scroll_bar.h',
       'controls/scrollbar/native_scroll_bar_views.cc',
@@ -282,7 +286,7 @@
       'style/mac/dialog_button_border_mac.h',
       'style/platform_style.cc',
       'style/platform_style.h',
-      'style/platform_style_mac.cc',
+      'style/platform_style_mac.mm',
       'view.cc',
       'view.h',
       'view_constants.cc',