sync compositor: Add output_surface_id

content/public/browser/android/synchronous_compositor.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 "content/public/browser/android/synchronous_compositor.h"
+
+#include <utility>
+
+#include "cc/output/compositor_frame.h"
+
+namespace content {
+
+SynchronousCompositor::Frame::Frame() : output_surface_id(0u) {}
+
+SynchronousCompositor::Frame::~Frame() {}
+
+SynchronousCompositor::Frame::Frame(Frame&& rhs)
+    : output_surface_id(rhs.output_surface_id), frame(std::move(rhs.frame)) {}
+
+SynchronousCompositor::Frame& SynchronousCompositor::Frame::operator=(
+    SynchronousCompositor::Frame&& rhs) {

[dcheng, 2016/03/22 07:22:37]

Frame&& rhs should work, for consistency with the move constructor.

[boliu, 2016/03/22 15:25:50]

Done.

+  output_surface_id = rhs.output_surface_id;
+  frame = std::move(rhs.frame);
+  return *this;
+}
+
+}  // namespace content