Change SetImage, SetBackground, and SetToggledImage to take in a gfx::ImageSkia

ash/wm/frame_painter.cc

Index: ash/wm/frame_painter.cc
diff --git a/ash/wm/frame_painter.cc b/ash/wm/frame_painter.cc
index 6bdc426c63e837acd46e9f7560321684ee7469e2..1258927896a4fdd21e54719a8534ad7f9b1373f0 100644
--- a/ash/wm/frame_painter.cc
+++ b/ash/wm/frame_painter.cc
@@ -558,11 +558,11 @@ void FramePainter::SetButtonImages(views::ImageButton* button,
                                    int pushed_bitmap_id) {
   ui::ThemeProvider* theme_provider = frame_->GetThemeProvider();
   button->SetImage(views::CustomButton::BS_NORMAL,
-                   theme_provider->GetBitmapNamed(normal_bitmap_id));
+                   theme_provider->GetImageSkiaNamed(normal_bitmap_id));
   button->SetImage(views::CustomButton::BS_HOT,
-                   theme_provider->GetBitmapNamed(hot_bitmap_id));
+                   theme_provider->GetImageSkiaNamed(hot_bitmap_id));
   button->SetImage(views::CustomButton::BS_PUSHED,
-                   theme_provider->GetBitmapNamed(pushed_bitmap_id));
+                   theme_provider->GetImageSkiaNamed(pushed_bitmap_id));
 }
 
 int FramePainter::GetTitleOffsetX() const {