review feedback: typedef -> using

Author: flar

display_list/display_list_canvas_unittests.cc

@@ -254,10 +254,10 @@ class BoundsTolerance {
   SkScalar discrete_offset_ = 0;
 };
 
-typedef const std::function<void(SkCanvas*, SkPaint&)> SkSetup;
-typedef const std::function<void(SkCanvas*, const SkPaint&)> SkRenderer;
-typedef const std::function<void(DlCanvas*, DlPaint&)> DlSetup;
-typedef const std::function<void(DlCanvas*, const DlPaint&)> DlRenderer;
+using SkSetup = const std::function<void(SkCanvas*, SkPaint&)>;
+using SkRenderer = const std::function<void(SkCanvas*, const SkPaint&)>;
+using DlSetup = const std::function<void(DlCanvas*, DlPaint&)>;
+using DlRenderer = const std::function<void(DlCanvas*, const DlPaint&)>;
 static const SkSetup kEmptySkSetup = [](SkCanvas*, SkPaint&) {};
 static const SkRenderer kEmptySkRenderer = [](SkCanvas*, const SkPaint&) {};
 static const DlSetup kEmptyDlSetup = [](DlCanvas*, DlPaint&) {};