Rework View Layer Draw() to use the Layer::DrawTree() method and the LayerDelegate.

views/view_unittest.cc

Index: views/view_unittest.cc
===================================================================
--- views/view_unittest.cc	(revision 100773)
+++ views/view_unittest.cc	(working copy)
@@ -2345,16 +2345,15 @@
 
 class TestCompositor : public ui::Compositor {
  public:
-  TestCompositor() : Compositor(gfx::Size(100, 100)) {}
+  TestCompositor() : Compositor(NULL, gfx::Size(100, 100)) {}
 
   // ui::Compositor:
   virtual ui::Texture* CreateTexture() OVERRIDE {
     return new TestTexture();
   }
-  virtual void NotifyStart() OVERRIDE {}
-  virtual void NotifyEnd() OVERRIDE {}
+  virtual void OnNotifyStart() OVERRIDE {}
+  virtual void OnNotifyEnd() OVERRIDE {}
   virtual void Blur(const gfx::Rect& bounds) OVERRIDE {}
-  virtual void SchedulePaint() OVERRIDE {}
 
  protected:
   virtual void OnWidgetSizeChanged() OVERRIDE {}