Use WebKit compositor in ui::Layer

ui/gfx/compositor/compositor.cc

Index: ui/gfx/compositor/compositor.cc
diff --git a/ui/gfx/compositor/compositor.cc b/ui/gfx/compositor/compositor.cc
index 6f7e5dba2a6ede01509996fb250dc7ca6d7125e7..97839c80d1dc4a64bd0e6b200a878e2c5f22068c 100644
--- a/ui/gfx/compositor/compositor.cc
+++ b/ui/gfx/compositor/compositor.cc
@@ -25,10 +25,15 @@ Compositor::Compositor(CompositorDelegate* delegate, const gfx::Size& size)
 Compositor::~Compositor() {
 }
 
+void Compositor::OnRootLayerChanged() {

[Ben Goodger (Google), 2011/10/16 22:39:51]

please keep the order of functions in the .cc in sync with the .h

[piman, 2011/10/19 17:53:23]

Done.

+  ScheduleDraw();
+}
+
 void Compositor::SetRootLayer(Layer* root_layer) {
   root_layer_ = root_layer;
   if (!root_layer_->GetCompositor())
     root_layer_->SetCompositor(this);
+  OnRootLayerChanged();
 }
 
 void Compositor::Draw(bool force_clear) {
@@ -36,10 +41,14 @@ void Compositor::Draw(bool force_clear) {
     return;
 
   NotifyStart(force_clear);
-  root_layer_->DrawTree();
+  DrawTree();
   NotifyEnd();
 }
 
+void Compositor::DrawTree() {
+  root_layer_->DrawTree();
+}
+
 void Compositor::AddObserver(CompositorObserver* observer) {
   observer_list_.AddObserver(observer);
 }