Remove parts of //cc we aren't using

cc/layers/picture_image_layer.cc

-// Copyright 2010 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/layers/picture_image_layer.h"
-
-#include "cc/layers/picture_image_layer_impl.h"
-#include "cc/resources/drawing_display_item.h"
-#include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/core/SkPictureRecorder.h"
-#include "ui/gfx/skia_util.h"
-
-namespace cc {
-
-scoped_refptr<PictureImageLayer> PictureImageLayer::Create() {
-  return make_scoped_refptr(new PictureImageLayer());
-}
-
-PictureImageLayer::PictureImageLayer() : PictureLayer(this) {}
-
-PictureImageLayer::~PictureImageLayer() {
-  ClearClient();
-}
-
-scoped_ptr<LayerImpl> PictureImageLayer::CreateLayerImpl(
-    LayerTreeImpl* tree_impl) {
-  return PictureImageLayerImpl::Create(tree_impl, id(), is_mask());
-}
-
-bool PictureImageLayer::HasDrawableContent() const {
-  return !bitmap_.isNull() && PictureLayer::HasDrawableContent();
-}
-
-void PictureImageLayer::SetBitmap(const SkBitmap& bitmap) {
-  // SetBitmap() currently gets called whenever there is any
-  // style change that affects the layer even if that change doesn't
-  // affect the actual contents of the image (e.g. a CSS animation).
-  // With this check in place we avoid unecessary texture uploads.
-  if (bitmap.pixelRef() && bitmap.pixelRef() == bitmap_.pixelRef())
-    return;
-
-  bitmap_ = bitmap;
-  UpdateDrawsContent(HasDrawableContent());
-  SetNeedsDisplay();
-}
-
-void PictureImageLayer::PaintContents(
-    SkCanvas* canvas,
-    const gfx::Rect& clip,
-    ContentLayerClient::PaintingControlSetting painting_control) {
-  if (!bitmap_.width() || !bitmap_.height())
-    return;
-
-  SkScalar content_to_layer_scale_x =
-      SkFloatToScalar(static_cast<float>(bounds().width()) / bitmap_.width());
-  SkScalar content_to_layer_scale_y =
-      SkFloatToScalar(static_cast<float>(bounds().height()) / bitmap_.height());
-  canvas->scale(content_to_layer_scale_x, content_to_layer_scale_y);
-
-  // Because Android WebView resourceless software draw mode rasters directly
-  // to the root canvas, this draw must use the kSrcOver_Mode so that
-  // transparent images blend correctly.
-  canvas->drawBitmap(bitmap_, 0, 0);
-}
-
-scoped_refptr<DisplayItemList> PictureImageLayer::PaintContentsToDisplayList(
-    const gfx::Rect& clip,
-    ContentLayerClient::PaintingControlSetting painting_control) {
-  scoped_refptr<DisplayItemList> display_item_list = DisplayItemList::Create();
-
-  SkPictureRecorder recorder;
-  SkCanvas* canvas = recorder.beginRecording(gfx::RectToSkRect(clip));
-  PaintContents(canvas, clip, painting_control);
-
-  skia::RefPtr<SkPicture> picture = skia::AdoptRef(recorder.endRecording());
-  display_item_list->AppendItem(DrawingDisplayItem::Create(picture));
-  return display_item_list;
-}
-
-bool PictureImageLayer::FillsBoundsCompletely() const {
-  return false;
-}
-
-}  // namespace cc