Plumb damage rect to browser compositor.

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index 160ac613400ba739d511fb5b1f09d94718d20796..bbf9821deab9873733a5ecb6666f301d8a5f91f4 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -364,8 +364,9 @@ void RenderWidgetHostViewAura::AcceleratedSurfacePostSubBuffer(
     const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params,
     int gpu_host_id) {
 #if defined(UI_COMPOSITOR_IMAGE_TRANSPORT)
-  window_->layer()->SetExternalTexture(
-      accelerated_surface_containers_[params.surface_id]->GetTexture());
+  scoped_refptr<AcceleratedSurfaceContainerLinux> container =
+      accelerated_surface_containers_[params.surface_id];
+    window_->layer()->SetExternalTexture(container->GetTexture());
   glFlush();
 
   if (!window_->layer()->GetCompositor()) {
@@ -373,9 +374,16 @@ void RenderWidgetHostViewAura::AcceleratedSurfacePostSubBuffer(
     // Must still send the ACK
     RenderWidgetHost::AcknowledgePostSubBuffer(params.route_id, gpu_host_id);
   } else {
-    // TODO(backer): Plumb the damage rect to the ui compositor so that we
-    // can do a partial swap to display.
+#if defined(USE_WEBKIT_COMPOSITOR)
+    // Co-ords come in GL co-ord space. Need to convert to layer space.

[sky, 2011/12/08 17:39:05]

I've never seen coordinates abbreviated like that.

[jonathan.backer, 2011/12/08 18:41:44]

Done.

+    window_->layer()->SchedulePaint(gfx::Rect(

[sky, 2011/12/08 17:39:05]

nit: window_->SchedulePaint should work equally well here.

[jonathan.backer, 2011/12/08 18:41:44]

Done.

+       params.x,
+       container->GetSize().height() - params.y - params.height,
+       params.width,
+       params.height));
+#else
     window_->layer()->ScheduleDraw();
+#endif
 
     // Add sending an ACK to the list of things to do OnCompositingEnded
     on_compositing_ended_callbacks_.push_back(