Remove parts of //cc we aren't using

cc/resources/compositing_display_item.cc

Index: cc/resources/compositing_display_item.cc
diff --git a/cc/resources/compositing_display_item.cc b/cc/resources/compositing_display_item.cc
deleted file mode 100644
index c33d4caeb4acdc3e8106154723a1030c2ea01add..0000000000000000000000000000000000000000
--- a/cc/resources/compositing_display_item.cc
+++ /dev/null
@@ -1,93 +0,0 @@
-// 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 "cc/resources/compositing_display_item.h"
-
-#include "base/strings/stringprintf.h"
-#include "base/trace_event/trace_event_argument.h"
-#include "third_party/skia/include/core/SkCanvas.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 {
-
-CompositingDisplayItem::CompositingDisplayItem(float opacity,
-                                               SkXfermode::Mode xfermode,
-                                               SkRect* bounds,
-                                               skia::RefPtr<SkColorFilter> cf)
-    : opacity_(opacity),
-      xfermode_(xfermode),
-      has_bounds_(!!bounds),
-      color_filter_(cf) {
-  if (bounds)
-    bounds_ = SkRect(*bounds);
-}
-
-CompositingDisplayItem::~CompositingDisplayItem() {
-}
-
-void CompositingDisplayItem::Raster(SkCanvas* canvas,
-                                    SkDrawPictureCallback* callback) const {
-  SkPaint paint;
-  paint.setXfermodeMode(xfermode_);
-  paint.setAlpha(opacity_ * 255);
-  paint.setColorFilter(color_filter_.get());
-  canvas->saveLayer(has_bounds_ ? &bounds_ : nullptr, &paint);
-}
-
-bool CompositingDisplayItem::IsSuitableForGpuRasterization() const {
-  return true;
-}
-
-int CompositingDisplayItem::ApproximateOpCount() const {
-  return 1;
-}
-
-size_t CompositingDisplayItem::PictureMemoryUsage() const {
-  // TODO(pdr): Include color_filter's memory here.
-  return sizeof(float) + sizeof(bool) + sizeof(SkRect) +
-         sizeof(SkXfermode::Mode);
-}
-
-void CompositingDisplayItem::AsValueInto(
-    base::trace_event::TracedValue* array) const {
-  array->AppendString(base::StringPrintf(
-      "CompositingDisplayItem opacity: %f, xfermode: %d", opacity_, xfermode_));
-  if (has_bounds_)
-    array->AppendString(base::StringPrintf(
-        ", bounds: [%f, %f, %f, %f]", static_cast<float>(bounds_.x()),
-        static_cast<float>(bounds_.y()), static_cast<float>(bounds_.width()),
-        static_cast<float>(bounds_.height())));
-}
-
-EndCompositingDisplayItem::EndCompositingDisplayItem() {
-}
-
-EndCompositingDisplayItem::~EndCompositingDisplayItem() {
-}
-
-void EndCompositingDisplayItem::Raster(SkCanvas* canvas,
-                                       SkDrawPictureCallback* callback) const {
-  canvas->restore();
-}
-
-bool EndCompositingDisplayItem::IsSuitableForGpuRasterization() const {
-  return true;
-}
-
-int EndCompositingDisplayItem::ApproximateOpCount() const {
-  return 0;
-}
-
-size_t EndCompositingDisplayItem::PictureMemoryUsage() const {
-  return 0;
-}
-
-void EndCompositingDisplayItem::AsValueInto(
-    base::trace_event::TracedValue* array) const {
-  array->AppendString("EndCompositingDisplayItem");
-}
-
-}  // namespace cc