Vectorize CrOS window control icons.

ash/frame/caption_buttons/frame_size_button_unittest.cc

Index: ash/frame/caption_buttons/frame_size_button_unittest.cc
diff --git a/ash/frame/caption_buttons/frame_size_button_unittest.cc b/ash/frame/caption_buttons/frame_size_button_unittest.cc
index ab86ac47136b861465405ad4a5f8d02b9c2c0830..c63e49ef22b7726b1b6ac06944df67f309afdef4 100644
--- a/ash/frame/caption_buttons/frame_size_button_unittest.cc
+++ b/ash/frame/caption_buttons/frame_size_button_unittest.cc
@@ -18,6 +18,7 @@
 #include "ui/events/test/event_generator.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/screen.h"
+#include "ui/gfx/vector_icons_public.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
 
@@ -65,7 +66,7 @@ class TestWidgetDelegate : public views::WidgetDelegateView {
       for (int icon = 0; icon < CAPTION_BUTTON_ICON_COUNT; ++icon) {
         caption_button_container_->SetButtonImage(
             static_cast<CaptionButtonIcon>(icon),
-            IDR_AURA_WINDOW_CONTROL_ICON_CLOSE);
+            gfx::VectorIconId::WINDOW_CONTROL_CLOSE);
       }
 
       AddChildView(caption_button_container_);