Remove parts of //cc we aren't using

cc/resources/drawing_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/drawing_display_item.h"
-
-#include <string>
-
-#include "base/logging.h"
-#include "base/strings/stringprintf.h"
-#include "base/trace_event/trace_event_argument.h"
-#include "cc/debug/picture_debug_util.h"
-#include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/core/SkDrawPictureCallback.h"
-#include "third_party/skia/include/core/SkMatrix.h"
-#include "third_party/skia/include/core/SkPicture.h"
-#include "third_party/skia/include/utils/SkPictureUtils.h"
-
-namespace cc {
-
-DrawingDisplayItem::DrawingDisplayItem(skia::RefPtr<SkPicture> picture)
-    : picture_(picture) {
-}
-
-DrawingDisplayItem::~DrawingDisplayItem() {
-}
-
-void DrawingDisplayItem::Raster(SkCanvas* canvas,
-                                SkDrawPictureCallback* callback) const {
-  canvas->save();
-  if (callback)
-    picture_->playback(canvas, callback);
-  else
-    canvas->drawPicture(picture_.get());
-  canvas->restore();
-}
-
-void DrawingDisplayItem::RasterForTracing(SkCanvas* canvas) const {
-  canvas->save();
-  // The picture debugger in about:tracing doesn't drill down into |drawPicture|
-  // operations. Calling |playback()| rather than |drawPicture()| causes the
-  // skia operations in |picture_| to appear individually in the picture
-  // produced for tracing rather than being hidden inside a drawPicture
-  // operation.
-  picture_->playback(canvas);
-  canvas->restore();
-}
-
-bool DrawingDisplayItem::IsSuitableForGpuRasterization() const {
-  return picture_->suitableForGpuRasterization(NULL);
-}
-
-int DrawingDisplayItem::ApproximateOpCount() const {
-  return picture_->approximateOpCount();
-}
-
-size_t DrawingDisplayItem::PictureMemoryUsage() const {
-  DCHECK(picture_);
-  return SkPictureUtils::ApproximateBytesUsed(picture_.get());
-}
-
-void DrawingDisplayItem::AsValueInto(
-    base::trace_event::TracedValue* array) const {
-  array->BeginDictionary();
-  array->SetString("name", "DrawingDisplayItem");
-  array->SetString(
-      "cullRect",
-      base::StringPrintf("[%f,%f,%f,%f]", picture_->cullRect().x(),
-                         picture_->cullRect().y(), picture_->cullRect().width(),
-                         picture_->cullRect().height()));
-  std::string b64_picture;
-  PictureDebugUtil::SerializeAsBase64(picture_.get(), &b64_picture);
-  array->SetString("skp64", b64_picture);
-  array->EndDictionary();
-}
-
-}  // namespace cc