Revert 106606 - Use WebKit compositor in ui::Layer

ui/gfx/compositor/compositor.cc

Index: ui/gfx/compositor/compositor.cc
===================================================================
--- ui/gfx/compositor/compositor.cc	(revision 106614)
+++ ui/gfx/compositor/compositor.cc	(working copy)
@@ -25,15 +25,10 @@
 Compositor::~Compositor() {
 }
 
-void Compositor::ScheduleDraw() {
-  delegate_->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) {
@@ -41,7 +36,7 @@
     return;
 
   NotifyStart(force_clear);
-  DrawTree();
+  root_layer_->DrawTree();
   NotifyEnd();
 }
 
@@ -57,14 +52,6 @@
   return observer_list_.HasObserver(observer);
 }
 
-void Compositor::OnRootLayerChanged() {
-  ScheduleDraw();
-}
-
-void Compositor::DrawTree() {
-  root_layer_->DrawTree();
-}
-
 void Compositor::NotifyStart(bool clear) {
   OnNotifyStart(clear);
 }