Plumb cc::LatencyInfo through command buffer and output surface

content/renderer/gpu/mailbox_output_surface.cc

 // Copyright (c) 2012 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/renderer/gpu/mailbox_output_surface.h"
 
 #include "base/logging.h"
 #include "cc/compositor_frame.h"
 #include "cc/compositor_frame_ack.h"
 #include "cc/gl_frame_data.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/khronos/GLES2/gl2ext.h"
 
 using cc::CompositorFrame;
 using cc::GLFrameData;
 using gpu::Mailbox;
 using WebKit::WebGraphicsContext3D;
 
 namespace content {
 
 MailboxOutputSurface::MailboxOutputSurface(
     int32 routing_id,
     WebGraphicsContext3D* context3D,
+    CommandBufferProxyImpl* proxy,
     cc::SoftwareOutputDevice* software_device)
     : CompositorOutputSurface(routing_id,
                               context3D,
+                              proxy,

[piman, 2013/03/19 04:30:29]

Note: I don't think this will do what you want, since in the case of the
MailboxOutputSurface, SwapBuffers isn't called on the context, nor will a
SetLatencyInfo be expected to come back.

                               software_device),
   fbo_(0) {
 }
 
 MailboxOutputSurface::~MailboxOutputSurface() {
   DiscardBackbuffer();
 }
 
 void MailboxOutputSurface::EnsureBackbuffer() {
   if (!current_backing_.texture_id) {
@@ skipping 117 matching lines @@
 
 void MailboxOutputSurface::SwapBuffers() {
 }
 
 void MailboxOutputSurface::PostSubBuffer(gfx::Rect rect) {
   NOTIMPLEMENTED()
       << "Partial swap not supported with composite-to-mailbox yet.";
 }
 
 }  // namespace content