Add frame color option to packaged app windows.

apps/ui/views/app_window_frame_view.cc

Index: apps/ui/views/app_window_frame_view.cc
diff --git a/apps/ui/views/app_window_frame_view.cc b/apps/ui/views/app_window_frame_view.cc
index a74f9e126db5726339f0590415ead2296cc7b6da..a2ab065b35241e9a5abf1f92f505bd0c8c7cdbe8 100644
--- a/apps/ui/views/app_window_frame_view.cc
+++ b/apps/ui/views/app_window_frame_view.cc
@@ -51,11 +51,13 @@ AppWindowFrameView::AppWindowFrameView(NativeAppWindow* window)
 AppWindowFrameView::~AppWindowFrameView() {}
 
 void AppWindowFrameView::Init(views::Widget* frame,
+                              const SkColor& frame_color,
                               int resize_inside_bounds_size,
                               int resize_outside_bounds_size,
                               int resize_outside_scale_for_touch,
                               int resize_area_corner_size) {
   frame_ = frame;
+  frame_color_ = frame_color;
   resize_inside_bounds_size_ = resize_inside_bounds_size;
   resize_outside_bounds_size_ = resize_outside_bounds_size;
   resize_area_corner_size_ = resize_area_corner_size;
@@ -307,7 +309,7 @@ void AppWindowFrameView::OnPaint(gfx::Canvas* canvas) {
   SkPaint paint;
   paint.setAntiAlias(false);
   paint.setStyle(SkPaint::kFill_Style);
-  paint.setColor(SK_ColorWHITE);
+  paint.setColor(frame_color_);
   gfx::Path path;
   path.moveTo(0, 0);
   path.lineTo(width(), 0);