ash: Clean up naming of paint-related identifiers

ash/common/system/tray/tray_details_view.cc

Index: ash/common/system/tray/tray_details_view.cc
diff --git a/ash/common/system/tray/tray_details_view.cc b/ash/common/system/tray/tray_details_view.cc
index 1b1b6f9b4d88e38f3fe7d7281f81fc28cb893955..efff1f3d130aacf6064abbb23cb6ecaab28dfee1 100644
--- a/ash/common/system/tray/tray_details_view.cc
+++ b/ash/common/system/tray/tray_details_view.cc
@@ -216,14 +216,14 @@ class ScrollContentsView : public views::View {
                   const gfx::Rect& shadowed_area) {
     ui::PaintRecorder recorder(context, size());
     gfx::Canvas* canvas = recorder.canvas();
-    cc::PaintFlags paint;
+    cc::PaintFlags flags;
     gfx::ShadowValues shadow;
     shadow.emplace_back(gfx::Vector2d(0, kShadowOffsetY), kShadowBlur,
                         kSeparatorColor);
-    paint.setLooper(gfx::CreateShadowDrawLooperCorrectBlur(shadow));
-    paint.setAntiAlias(true);
+    flags.setLooper(gfx::CreateShadowDrawLooperCorrectBlur(shadow));
+    flags.setAntiAlias(true);
     canvas->ClipRect(shadowed_area, SkClipOp::kDifference);
-    canvas->DrawRect(shadowed_area, paint);
+    canvas->DrawRect(shadowed_area, flags);
   }
 
   views::BoxLayout* box_layout_;