apps: Move chrome's ShellWindowFrameView into apps/

chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm

Index: chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm b/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
index fd18e0ce06d7c37e9b9359641c466d0f4382a78d..478e1890581804ed22a1d361c608a7c0c432238d 100644
--- a/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
+++ b/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
@@ -681,6 +681,10 @@ void NativeAppWindowCocoa::UpdateDraggableRegions(
   InstallDraggableRegionViews();
 }
 
+SkRegion* NativeAppWindowCocoa::GetDraggableRegion() {
+  return draggable_region_.get();
+}
+
 void NativeAppWindowCocoa::UpdateDraggableRegionsForSystemDrag(
     const std::vector<extensions::DraggableRegion>& regions,
     const extensions::DraggableRegion* draggable_area) {
@@ -828,6 +832,10 @@ void NativeAppWindowCocoa::RenderViewHostChanged(
   web_contents()->GetView()->Focus();
 }
 
+bool NativeAppWindowCocoa::IsFrameless() const {
+  return !has_frame_;
+}
+
 gfx::Insets NativeAppWindowCocoa::GetFrameInsets() const {
   if (!has_frame_)
     return gfx::Insets();