Remove parts of //cc we aren't using

cc/resources/display_item_list.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/display_item_list.h"
-
-#include <string>
-
-#include "base/trace_event/trace_event.h"
-#include "base/trace_event/trace_event_argument.h"
-#include "cc/base/math_util.h"
-#include "cc/debug/picture_debug_util.h"
-#include "cc/debug/traced_picture.h"
-#include "cc/debug/traced_value.h"
-#include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/core/SkDrawPictureCallback.h"
-#include "third_party/skia/include/core/SkPictureRecorder.h"
-#include "third_party/skia/include/utils/SkPictureUtils.h"
-#include "ui/gfx/skia_util.h"
-
-namespace cc {
-
-DisplayItemList::DisplayItemList()
-    : is_suitable_for_gpu_rasterization_(true), approximate_op_count_(0) {
-}
-
-scoped_refptr<DisplayItemList> DisplayItemList::Create() {
-  return make_scoped_refptr(new DisplayItemList());
-}
-
-DisplayItemList::~DisplayItemList() {
-}
-
-void DisplayItemList::Raster(SkCanvas* canvas,
-                             SkDrawPictureCallback* callback,
-                             float contents_scale) const {
-  if (!picture_) {
-    canvas->save();
-    canvas->scale(contents_scale, contents_scale);
-    for (size_t i = 0; i < items_.size(); ++i) {
-      items_[i]->Raster(canvas, callback);
-    }
-    canvas->restore();
-  } else {
-    DCHECK(picture_);
-
-    canvas->save();
-    canvas->scale(contents_scale, contents_scale);
-    if (callback) {
-      // If we have a callback, we need to call |draw()|, |drawPicture()|
-      // doesn't take a callback.  This is used by |AnalysisCanvas| to early
-      // out.
-      picture_->playback(canvas, callback);
-    } else {
-      // Prefer to call |drawPicture()| on the canvas since it could place the
-      // entire picture on the canvas instead of parsing the skia operations.
-      canvas->drawPicture(picture_.get());
-    }
-    canvas->restore();
-  }
-}
-
-void DisplayItemList::CreateAndCacheSkPicture() {
-  // Convert to an SkPicture for faster rasterization. Code is identical to
-  // that in Picture::Record.
-  SkRTreeFactory factory;
-  SkPictureRecorder recorder;
-  skia::RefPtr<SkCanvas> canvas;
-  canvas = skia::SharePtr(recorder.beginRecording(
-      layer_rect_.width(), layer_rect_.height(), &factory));
-  canvas->translate(-layer_rect_.x(), -layer_rect_.y());
-  canvas->clipRect(gfx::RectToSkRect(layer_rect_));
-  for (size_t i = 0; i < items_.size(); ++i)
-    items_[i]->Raster(canvas.get(), NULL);
-  picture_ = skia::AdoptRef(recorder.endRecording());
-  DCHECK(picture_);
-}
-
-void DisplayItemList::AppendItem(scoped_ptr<DisplayItem> item) {
-  is_suitable_for_gpu_rasterization_ &= item->IsSuitableForGpuRasterization();
-  approximate_op_count_ += item->ApproximateOpCount();
-  items_.push_back(item.Pass());
-}
-
-bool DisplayItemList::IsSuitableForGpuRasterization() const {
-  // This is more permissive than Picture's implementation, since none of the
-  // items might individually trigger a veto even though they collectively have
-  // enough "bad" operations that a corresponding Picture would get vetoed.
-  return is_suitable_for_gpu_rasterization_;
-}
-
-int DisplayItemList::ApproximateOpCount() const {
-  return approximate_op_count_;
-}
-
-size_t DisplayItemList::PictureMemoryUsage() const {
-  size_t total_size = 0;
-
-  for (const auto& item : items_) {
-    total_size += item->PictureMemoryUsage();
-  }
-
-  if (picture_)
-    total_size += SkPictureUtils::ApproximateBytesUsed(picture_.get());
-
-  return total_size;
-}
-
-scoped_refptr<base::trace_event::ConvertableToTraceFormat>
-DisplayItemList::AsValue() const {
-  scoped_refptr<base::trace_event::TracedValue> state =
-      new base::trace_event::TracedValue();
-
-  state->SetInteger("length", items_.size());
-  state->BeginArray("params.items");
-  for (const DisplayItem* item : items_) {
-    item->AsValueInto(state.get());
-  }
-  state->EndArray();
-  state->SetValue("params.layer_rect",
-                  MathUtil::AsValue(layer_rect_).release());
-
-  SkPictureRecorder recorder;
-  SkCanvas* canvas =
-      recorder.beginRecording(layer_rect_.width(), layer_rect_.height());
-  canvas->translate(-layer_rect_.x(), -layer_rect_.y());
-  canvas->clipRect(gfx::RectToSkRect(layer_rect_));
-  for (size_t i = 0; i < items_.size(); ++i)
-    items_[i]->RasterForTracing(canvas);
-  skia::RefPtr<SkPicture> picture = skia::AdoptRef(recorder.endRecording());
-
-  std::string b64_picture;
-  PictureDebugUtil::SerializeAsBase64(picture.get(), &b64_picture);
-  state->SetString("skp64", b64_picture);
-
-  return state;
-}
-
-void DisplayItemList::EmitTraceSnapshot() const {
-  TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(
-      TRACE_DISABLED_BY_DEFAULT("cc.debug.picture") ","
-      TRACE_DISABLED_BY_DEFAULT("devtools.timeline.picture"),
-      "cc::DisplayItemList", this, AsValue());
-}
-
-}  // namespace cc