tracing: Make ConvertableToTraceFormat move-only scoped_ptr

cc/debug/layer_debug_info.cc

+// Copyright 2016 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/layer_debug_info.h"
+
+#include "base/trace_event/trace_event_impl.h"
+
+namespace cc {
+
+LayerDebugInfo::LayerDebugInfo(
+    scoped_ptr<base::trace_event::ConvertableToTraceFormat> raw)
+    : raw_(std::move(raw)) {}
+LayerDebugInfo::~LayerDebugInfo() {}
+
+void LayerDebugInfo::AppendAsTraceFormat(std::string* out) const {
+  raw_->AppendAsTraceFormat(out);
+}
+
+}  // namespace cc