ash: Clean up naming of paint-related identifiers

ash/common/accelerators/exit_warning_handler.cc

Index: ash/common/accelerators/exit_warning_handler.cc
diff --git a/ash/common/accelerators/exit_warning_handler.cc b/ash/common/accelerators/exit_warning_handler.cc
index 370dfbb10d7b4c833f084294a98843d5ed087849..9393425d4ef92ce60a5395fd7764bbc75a3019eb 100644
--- a/ash/common/accelerators/exit_warning_handler.cc
+++ b/ash/common/accelerators/exit_warning_handler.cc
@@ -73,10 +73,10 @@ class ExitWarningWidgetDelegateView : public views::WidgetDelegateView {
   }
 
   void OnPaint(gfx::Canvas* canvas) override {
-    cc::PaintFlags paint;
-    paint.setStyle(cc::PaintFlags::kFill_Style);
-    paint.setColor(kWindowBackgroundColor);
-    canvas->DrawRoundRect(GetLocalBounds(), kWindowCornerRadius, paint);
+    cc::PaintFlags flags;
+    flags.setStyle(cc::PaintFlags::kFill_Style);
+    flags.setColor(kWindowBackgroundColor);
+    canvas->DrawRoundRect(GetLocalBounds(), kWindowCornerRadius, flags);
     views::WidgetDelegateView::OnPaint(canvas);
   }