Revert of Back PaintRecord with PaintOpBuffer instead of SkPicture

cc/paint/skia_paint_canvas.cc

Index: cc/paint/skia_paint_canvas.cc
diff --git a/cc/paint/skia_paint_canvas.cc b/cc/paint/skia_paint_canvas.cc
index 501ccdfe235201b27a51f084e3e88372103757f9..bfc38b6028239993a8ceb12930c92f4be66cb473 100644
--- a/cc/paint/skia_paint_canvas.cc
+++ b/cc/paint/skia_paint_canvas.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "cc/paint/skia_paint_canvas.h"
+#include "cc/paint/paint_canvas.h"
 
 #include "base/memory/ptr_util.h"
 #include "cc/paint/display_item_list.h"
@@ -58,7 +58,7 @@
   return canvas_->saveLayer(bounds, ToSkPaint(flags));
 }
 
-int SkiaPaintCanvas::saveLayerAlpha(const SkRect* bounds, uint8_t alpha) {
+int SkiaPaintCanvas::saveLayerAlpha(const SkRect* bounds, U8CPU alpha) {
   return canvas_->saveLayerAlpha(bounds, alpha);
 }