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

ash/system/brightness/tray_brightness.cc

Index: ash/system/brightness/tray_brightness.cc
diff --git a/ash/system/brightness/tray_brightness.cc b/ash/system/brightness/tray_brightness.cc
index b52e97855ae436059d6992a6fadd83a3d38f931a..33ced238cb0e604b287680efb3c15135901c19ed 100644
--- a/ash/system/brightness/tray_brightness.cc
+++ b/ash/system/brightness/tray_brightness.cc
@@ -52,7 +52,7 @@ class BrightnessView : public views::View,
     views::ImageView* icon = new FixedSizedImageView(0, kTrayPopupItemHeight);
     gfx::Image image = ui::ResourceBundle::GetSharedInstance().GetImageNamed(
         IDR_AURA_UBER_TRAY_BRIGHTNESS);
-    icon->SetImage(image.ToSkBitmap());
+    icon->SetImage(image.ToImageSkia());
     AddChildView(icon);
 
     slider_ = new views::Slider(this, views::Slider::HORIZONTAL);