content/aura: Use gfx::Canvas::DrawRect instead of unwrapping SkCanvas.

content/browser/web_contents/aura/shadow_layer_delegate.cc

Index: content/browser/web_contents/aura/shadow_layer_delegate.cc
diff --git a/content/browser/web_contents/aura/shadow_layer_delegate.cc b/content/browser/web_contents/aura/shadow_layer_delegate.cc
index 54543075adc8648a332f1afbe3f938fae442e758..a38d5ca2b57a70f295dc445b7eea9634150df135 100644
--- a/content/browser/web_contents/aura/shadow_layer_delegate.cc
+++ b/content/browser/web_contents/aura/shadow_layer_delegate.cc
@@ -50,8 +50,7 @@ void ShadowLayerDelegate::OnPaintLayer(const ui::PaintContext& context) {
   SkPaint paint;
   paint.setShader(shader.get());
   ui::PaintRecorder recorder(context);
-  recorder.canvas()->sk_canvas()->drawRect(gfx::RectToSkRect(paint_rect),
-                                           paint);
+  recorder.canvas()->DrawRect(paint_rect, paint);
 }
 
 void ShadowLayerDelegate::OnDelegatedFrameDamage(