Rename paint data structures

ash/common/shelf/shelf_widget.cc

Index: ash/common/shelf/shelf_widget.cc
diff --git a/ash/common/shelf/shelf_widget.cc b/ash/common/shelf/shelf_widget.cc
index d735e5897c17a0ddbd815142ed7698def34e053b..524d2c7da75111147abfbc090a48dd55fd5a0cb9 100644
--- a/ash/common/shelf/shelf_widget.cc
+++ b/ash/common/shelf/shelf_widget.cc
@@ -140,7 +140,7 @@ void ShelfWidget::DelegateView::OnPaintBackground(gfx::Canvas* canvas) {
   }
   const gfx::Rect dock_bounds(
       shelf_widget_->shelf_layout_manager()->dock_bounds());
-  SkPaint paint;
+  cc::PaintFlags paint;
   paint.setAlpha(asset_background_alpha_);
   canvas->DrawImageInt(
       shelf_background, 0, 0, shelf_background.width(),