An energy usage monitor for Mac, and some layer-backed throbber experiments

ui/gfx/paint_throbber.h

Index: ui/gfx/paint_throbber.h
diff --git a/ui/gfx/paint_throbber.h b/ui/gfx/paint_throbber.h
index c4adab5dd2f35b5a6e078c7842655e76e7b06da1..1690b37b7c721866d6f1176be687741492920fcf 100644
--- a/ui/gfx/paint_throbber.h
+++ b/ui/gfx/paint_throbber.h
@@ -28,6 +28,12 @@ struct GFX_EXPORT ThrobberWaitingState {
   base::TimeDelta arc_time_offset;
 };
 
+GFX_EXPORT void PaintThrobberArc(Canvas* canvas,
+                                 const Rect& bounds,
+                                 SkColor color,
+                                 SkScalar start_angle,
+                                 SkScalar sweep);
+
 // Paints a single frame of the throbber in the "spinning", aka Material, state.
 GFX_EXPORT void PaintThrobberSpinning(Canvas* canvas,
     const Rect& bounds, SkColor color, const base::TimeDelta& elapsed_time);
@@ -35,7 +41,10 @@ GFX_EXPORT void PaintThrobberSpinning(Canvas* canvas,
 // Paints a throbber in the "waiting" state. Used when waiting on a network
 // response, for example.
 GFX_EXPORT void PaintThrobberWaiting(Canvas* canvas,
-    const Rect& bounds, SkColor color, const base::TimeDelta& elapsed_time);
+                                     const Rect& bounds,
+                                     SkColor color,
+                                     const base::TimeDelta& elapsed_time,
+                                     bool anti_alias);
 
 // Paint a throbber in the "spinning" state, smoothly transitioning from a
 // previous "waiting" state described by |waiting_state|, which is an in-out