Update from https://crrev.com/306655

cc/resources/filter_display_item.cc

+// Copyright 2014 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 "cc/resources/filter_display_item.h"
+
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkImageFilter.h"
+#include "third_party/skia/include/core/SkPaint.h"
+#include "third_party/skia/include/core/SkXfermode.h"
+#include "ui/gfx/skia_util.h"
+
+namespace cc {
+
+FilterDisplayItem::FilterDisplayItem(skia::RefPtr<SkImageFilter> filter,
+                                     gfx::RectF bounds)
+    : filter_(filter), bounds_(bounds) {
+}
+
+FilterDisplayItem::~FilterDisplayItem() {
+}
+
+void FilterDisplayItem::Raster(SkCanvas* canvas,
+                               SkDrawPictureCallback* callback) const {
+  canvas->save();
+  SkRect boundaries;
+  filter_->computeFastBounds(gfx::RectFToSkRect(bounds_), &boundaries);
+  canvas->translate(bounds_.x(), bounds_.y());
+  boundaries.offset(-bounds_.x(), -bounds_.y());
+
+  SkPaint paint;
+  paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
+  paint.setImageFilter(filter_.get());
+  canvas->saveLayer(&boundaries, &paint);
+
+  canvas->translate(-bounds_.x(), -bounds_.y());
+}
+
+bool FilterDisplayItem::IsSuitableForGpuRasterization() const {
+  return true;
+}
+
+int FilterDisplayItem::ApproximateOpCount() const {
+  return 1;
+}
+
+size_t FilterDisplayItem::PictureMemoryUsage() const {
+  return sizeof(skia::RefPtr<SkImageFilter>) + sizeof(gfx::RectF);
+}
+
+EndFilterDisplayItem::EndFilterDisplayItem() {
+}
+
+EndFilterDisplayItem::~EndFilterDisplayItem() {
+}
+
+void EndFilterDisplayItem::Raster(SkCanvas* canvas,
+                                  SkDrawPictureCallback* callback) const {
+  canvas->restore();
+  canvas->restore();
+}
+
+bool EndFilterDisplayItem::IsSuitableForGpuRasterization() const {
+  return true;
+}
+
+int EndFilterDisplayItem::ApproximateOpCount() const {
+  return 0;
+}
+
+size_t EndFilterDisplayItem::PictureMemoryUsage() const {
+  return 0;
+}
+
+}  // namespace cc