Use shared D3D9 texture to transport the compositor's backing buffer to the browser...

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
===================================================================
--- content/browser/renderer_host/render_widget_host_view_aura.cc	(revision 108480)
+++ content/browser/renderer_host/render_widget_host_view_aura.cc	(working copy)
@@ -279,46 +279,50 @@
   return new BackingStoreSkia(host_, size);
 }
 
-#if defined(UI_COMPOSITOR_IMAGE_TRANSPORT)
-void RenderWidgetHostViewAura::AcceleratedSurfaceNew(
-      int32 width,
-      int32 height,
-      uint64* surface_id,
-      TransportDIB::Handle* surface_handle) {
-  scoped_refptr<AcceleratedSurfaceContainerLinux> surface(
-      AcceleratedSurfaceContainerLinux::Create(gfx::Size(width, height)));
-  if (!surface->Initialize(surface_id)) {
-    LOG(ERROR) << "Failed to create AcceleratedSurfaceContainer";
-    return;
-  }
-  *surface_handle = surface->Handle();
-
-  accelerated_surface_containers_[*surface_id] = surface;
-}
-
 void RenderWidgetHostViewAura::AcceleratedSurfaceBuffersSwapped(
-      uint64 surface_id,
-      int32 route_id,
+      const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params,
       int gpu_host_id) {
+#if defined(UI_COMPOSITOR_IMAGE_TRANSPORT)
   window_->layer()->SetExternalTexture(
-      accelerated_surface_containers_[surface_id]->GetTexture());
+      accelerated_surface_containers_[params.surface_id]->GetTexture());
   glFlush();
 
   if (!window_->layer()->GetCompositor()) {
     // We have no compositor, so we have no way to display the surface
-    AcknowledgeSwapBuffers(route_id, gpu_host_id);  // Must still send the ACK
+    // Must still send the ACK.
+    AcknowledgeSwapBuffers(params.route_id, gpu_host_id);
   } else {
     window_->layer()->ScheduleDraw();
 
     // Add sending an ACK to the list of things to do OnCompositingEnded
     on_compositing_ended_callbacks_.push_back(
-        base::Bind(AcknowledgeSwapBuffers, route_id, gpu_host_id));
+        base::Bind(AcknowledgeSwapBuffers, params.route_id, gpu_host_id));
     ui::Compositor* compositor = window_->layer()->GetCompositor();
     if (!compositor->HasObserver(this))
       compositor->AddObserver(this);
   }
+#else
+  NOTREACHED();
+#endif
 }
 
+#if defined(UI_COMPOSITOR_IMAGE_TRANSPORT)
+void RenderWidgetHostViewAura::AcceleratedSurfaceNew(
+      int32 width,
+      int32 height,
+      uint64* surface_id,
+      TransportDIB::Handle* surface_handle) {
+  scoped_refptr<AcceleratedSurfaceContainerLinux> surface(
+      AcceleratedSurfaceContainerLinux::Create(gfx::Size(width, height)));
+  if (!surface->Initialize(surface_id)) {
+    LOG(ERROR) << "Failed to create AcceleratedSurfaceContainer";
+    return;
+  }
+  *surface_handle = surface->Handle();
+
+  accelerated_surface_containers_[*surface_id] = surface;
+}
+
 void RenderWidgetHostViewAura::AcceleratedSurfaceRelease(uint64 surface_id) {
   accelerated_surface_containers_.erase(surface_id);
 }