Make cc/paint have concrete types

cc/paint/paint_record.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef PaintCanvas_h
-#define PaintCanvas_h
+#include "cc/paint/paint_record.h"
 
 #include "cc/paint/paint_canvas.h"
 
-namespace blink {
-using cc::PaintCanvas;
-using cc::PaintCanvasAutoRestore;
-using cc::PaintCanvasPassThrough;
-using cc::ToPixmap;
+namespace cc {
+
+void PaintRecord::playback(PaintCanvas* canvas) {
+  playback(canvas->canvas_);
 }
 
-#endif  // PaintCanvas_h
+}  // namespace cc