Plumb cc::LatencyInfo through command buffer and output surface

content/renderer/gpu/compositor_output_surface.cc

Index: content/renderer/gpu/compositor_output_surface.cc
diff --git a/content/renderer/gpu/compositor_output_surface.cc b/content/renderer/gpu/compositor_output_surface.cc
index cc55ffa884adf3be780559afa7a34e574381b9f3..3722aded40d82247d25b7479c0769925fca4d039 100644
--- a/content/renderer/gpu/compositor_output_surface.cc
+++ b/content/renderer/gpu/compositor_output_surface.cc
@@ -9,6 +9,8 @@
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/output_surface_client.h"
+#include "content/common/gpu/client/command_buffer_proxy_impl.h"
+#include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 #include "content/common/view_messages.h"
 #include "content/public/common/content_switches.h"
 #include "content/renderer/render_thread_impl.h"
@@ -52,9 +54,9 @@ IPC::ForwardingMessageFilter* CompositorOutputSurface::CreateFilter(
 
 CompositorOutputSurface::CompositorOutputSurface(
     int32 routing_id,
-    WebGraphicsContext3D* context3D,
+    WebGraphicsContext3DCommandBufferImpl* context3D,
     cc::SoftwareOutputDevice* software_device)
-    : OutputSurface(make_scoped_ptr(context3D),
+    : OutputSurface(scoped_ptr<WebKit::WebGraphicsContext3D>(context3D),
                     make_scoped_ptr(software_device)),
       output_surface_filter_(
           RenderThreadImpl::current()->compositor_output_surface_filter()),
@@ -100,6 +102,32 @@ void CompositorOutputSurface::SendFrameToParentCompositor(
   Send(new ViewHostMsg_SwapCompositorFrame(routing_id_, *frame));
 }
 
+void CompositorOutputSurface::SwapBuffers(
+    const cc::LatencyInfo& latency_info) {
+  WebGraphicsContext3DCommandBufferImpl* command_buffer =
+      static_cast<WebGraphicsContext3DCommandBufferImpl*>(context3d());
+  CommandBufferProxyImpl* command_buffer_proxy =
+      command_buffer->GetCommandBufferProxy();
+  if (command_buffer_proxy) {

[piman, 2013/04/03 18:05:09]

I think DCHECK is enough. If we're able to send commands through the context, we
have a CommandBufferProxyImpl.

+    context3d()->flush();

[piman, 2013/04/03 18:05:09]

nit: shallowFlush

+    command_buffer_proxy->SetLatencyInfo(latency_info);
+  }
+  OutputSurface::SwapBuffers(latency_info);
+}
+
+void CompositorOutputSurface::PostSubBuffer(
+    gfx::Rect rect, const cc::LatencyInfo& latency_info) {
+  WebGraphicsContext3DCommandBufferImpl* command_buffer =
+      static_cast<WebGraphicsContext3DCommandBufferImpl*>(context3d());
+  CommandBufferProxyImpl* command_buffer_proxy =
+      command_buffer->GetCommandBufferProxy();
+  if (command_buffer_proxy) {

[piman, 2013/04/03 18:05:09]

just DCHECK

+    context3d()->flush();

[piman, 2013/04/03 18:05:09]

nit: shallowFlush

+    command_buffer_proxy->SetLatencyInfo(latency_info);
+  }
+  OutputSurface::PostSubBuffer(rect, latency_info);
+}
+
 void CompositorOutputSurface::OnMessageReceived(const IPC::Message& message) {
   DCHECK(CalledOnValidThread());
   if (!client_)