html_viewer/Mandoline: Avoid subclassing WebLayerImpl

components/html_viewer/web_layer_impl.cc

-// Copyright 2015 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.
-
-#include "components/html_viewer/web_layer_impl.h"
-
-#include "base/bind.h"
-#include "cc/layers/layer.h"
-#include "components/mus/public/cpp/view.h"
-#include "ui/gfx/geometry/dip_util.h"
-#include "ui/mojo/geometry/geometry.mojom.h"
-
-using blink::WebFloatPoint;
-using blink::WebSize;
-
-namespace html_viewer {
-
-namespace {
-
-// See surface_layer.h for a description of this callback.
-void SatisfyCallback(cc::SurfaceSequence sequence) {
-  // TODO(fsamuel): Implement this.
-}
-
-// See surface_layer.h for a description of this callback.
-void RequireCallback(cc::SurfaceId surface_id,
-                     cc::SurfaceSequence sequence) {
-  // TODO(fsamuel): Implement this.
-}
-
-}
-
-WebLayerImpl::WebLayerImpl(mus::View* view, float device_pixel_ratio)
-    : cc_blink::WebLayerImpl(
-          cc::SurfaceLayer::Create(cc_blink::WebLayerImpl::LayerSettings(),
-                                   base::Bind(&SatisfyCallback),
-                                   base::Bind(&RequireCallback))),
-      view_(view),
-      device_pixel_ratio_(device_pixel_ratio) {}
-
-WebLayerImpl::~WebLayerImpl() {
-}
-
-void WebLayerImpl::setBounds(const WebSize& size) {
-  gfx::Size size_in_pixels =
-      gfx::ScaleToCeiledSize(gfx::Size(size), device_pixel_ratio_);
-  static_cast<cc::SurfaceLayer*>(layer())->
-      SetSurfaceId(cc::SurfaceId(view_->id()),
-                   device_pixel_ratio_, size_in_pixels);
-  cc_blink::WebLayerImpl::setBounds(size);
-}
-
-}  // namespace html_viewer