Add use-surfaces command-line flag

content/browser/compositor/surface_display_output_surface.cc

+// Copyright 2014 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/browser/compositor/surface_display_output_surface.h"
+
+#include "cc/output/compositor_frame.h"
+#include "cc/surfaces/display.h"
+#include "cc/surfaces/surface.h"
+#include "cc/surfaces/surface_manager.h"
+
+namespace content {
+
+SurfaceDisplayOutputSurface::SurfaceDisplayOutputSurface(
+    cc::Display* display,
+    cc::SurfaceManager* surface_manager,
+    const scoped_refptr<cc::ContextProvider>& context_provider,
+    scoped_ptr<cc::SoftwareOutputDevice> software_device)
+    : cc::OutputSurface(context_provider, software_device.Pass()),
+      display_(display),
+      surface_manager_(surface_manager) {
+  capabilities_.delegated_rendering = true;
+  capabilities_.max_frames_pending = 1;
+}
+
+SurfaceDisplayOutputSurface::~SurfaceDisplayOutputSurface() {
+}
+
+void SurfaceDisplayOutputSurface::SwapBuffers(cc::CompositorFrame* frame) {
+  gfx::Size frame_size =
+      frame->delegated_frame_data->render_pass_list.back()->output_rect.size();
+  display_->Resize(frame_size);
+  int surface_id = display_->CurrentSurfaceID();
+  cc::Surface* surface = surface_manager_->GetSurfaceForID(surface_id);
+  if (!surface)
+    return;
+
+  scoped_ptr<cc::CompositorFrame> frame_copy(new cc::CompositorFrame());
+  frame->AssignTo(frame_copy.get());
+  surface->QueueFrame(frame_copy.Pass());
+
+  if (!display_->Draw())
+    return;
+
+  client_->DidSwapBuffers();
+  client_->DidSwapBuffersComplete();
+}
+
+}  // namespace content