Adding support for VSyncProvider to the software drawing path

content/browser/aura/gpu_browser_compositor_output_surface.cc

+// Copyright 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 "content/browser/aura/gpu_browser_compositor_output_surface.h"
+
+#include "cc/output/compositor_frame.h"
+#include "content/browser/aura/reflector_impl.h"
+#include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
+
+namespace content {
+
+GpuBrowserCompositorOutputSurface::GpuBrowserCompositorOutputSurface(
+    const scoped_refptr<ContextProviderCommandBuffer>& context,
+    int surface_id,
+    IDMap<BrowserCompositorOutputSurface>* output_surface_map,
+    base::MessageLoopProxy* compositor_message_loop,
+    base::WeakPtr<ui::Compositor> compositor)
+    : BrowserCompositorOutputSurface(context,
+                                     surface_id,
+                                     output_surface_map,
+                                     compositor_message_loop,
+                                     compositor) {}
+
+GpuBrowserCompositorOutputSurface::~GpuBrowserCompositorOutputSurface() {}
+
+void GpuBrowserCompositorOutputSurface::SwapBuffers(
+    cc::CompositorFrame* frame) {
+  DCHECK(frame->gl_frame_data);
+
+  WebGraphicsContext3DCommandBufferImpl* command_buffer_context =
+      static_cast<WebGraphicsContext3DCommandBufferImpl*>(
+          context_provider_->Context3d());
+  CommandBufferProxyImpl* command_buffer_proxy =
+      command_buffer_context->GetCommandBufferProxy();
+  DCHECK(command_buffer_proxy);
+  context_provider_->Context3d()->shallowFlushCHROMIUM();
+  command_buffer_proxy->SetLatencyInfo(frame->metadata.latency_info);
+
+  if (reflector_.get()) {
+    if (frame->gl_frame_data->sub_buffer_rect ==
+        gfx::Rect(frame->gl_frame_data->size))
+      reflector_->OnSwapBuffers();
+    else
+      reflector_->OnPostSubBuffer(frame->gl_frame_data->sub_buffer_rect);
+  }
+
+  OutputSurface::SwapBuffers(frame);
+}
+
+}  // namespace content