Remove parts of //cc we aren't using

cc/debug/traced_picture.cc

-// Copyright (c) 2013 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/debug/traced_picture.h"
-
-#include "base/json/json_writer.h"
-#include "base/strings/stringprintf.h"
-#include "base/values.h"
-
-namespace cc {
-
-TracedPicture::TracedPicture(scoped_refptr<const Picture> picture)
-    : picture_(picture), is_alias_(false) {}
-
-TracedPicture::~TracedPicture() {
-}
-
-scoped_refptr<base::trace_event::ConvertableToTraceFormat>
-TracedPicture::AsTraceablePicture(const Picture* picture) {
-  return scoped_refptr<base::trace_event::ConvertableToTraceFormat>(
-      new TracedPicture(picture));
-}
-
-scoped_refptr<base::trace_event::ConvertableToTraceFormat>
-TracedPicture::AsTraceablePictureAlias(const Picture* original) {
-  scoped_refptr<TracedPicture> ptr = new TracedPicture(original);
-  ptr->is_alias_ = true;
-  return scoped_refptr<base::trace_event::ConvertableToTraceFormat>(ptr);
-}
-
-void TracedPicture::AppendAsTraceFormat(std::string* out) const {
-  if (is_alias_)
-    AppendPictureAlias(out);
-  else
-    AppendPicture(out);
-}
-
-void TracedPicture::AppendPictureAlias(std::string* out) const {
-  scoped_ptr<base::DictionaryValue> alias(new base::DictionaryValue());
-  alias->SetString("id_ref", base::StringPrintf("%p", picture_.get()));
-
-  scoped_ptr<base::DictionaryValue> res(new base::DictionaryValue());
-  res->Set("alias", alias.release());
-
-  std::string tmp;
-  base::JSONWriter::Write(res.get(), &tmp);
-  out->append(tmp);
-}
-
-void TracedPicture::AppendPicture(std::string* out) const {
-  scoped_ptr<base::Value> value = picture_->AsValue();
-  std::string tmp;
-  base::JSONWriter::Write(value.get(), &tmp);
-  out->append(tmp);
-}
-
-}  // namespace cc