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

ui/gfx/compositor/test_compositor_host_win.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/compositor/test_compositor_host.h"
 
 #include "base/compiler_specific.h"
 #include "ui/base/win/window_impl.h"
 #include "ui/gfx/compositor/compositor.h"
 
 namespace ui {
 
 class TestCompositorHostWin : public TestCompositorHost,
-                              public ui::WindowImpl {
+                              public WindowImpl,
+                              public CompositorDelegate {
  public:
   TestCompositorHostWin(const gfx::Rect& bounds,
                         TestCompositorHostDelegate* delegate)
       : delegate_(delegate) {
     Init(NULL, bounds);
-    compositor_ = ui::Compositor::Create(hwnd(), GetSize());
+    compositor_ = ui::Compositor::Create(this, hwnd(), GetSize());
   }
 
   virtual ~TestCompositorHostWin() {
     DestroyWindow(hwnd());
   }
 
   // Overridden from MessageLoop::Dispatcher:
   virtual bool Dispatch(const MSG& msg) {
     TranslateMessage(&msg);
     DispatchMessage(&msg);
     return true;
   }
 
   // Overridden from TestCompositorHost:
   virtual void Show() OVERRIDE {
     ShowWindow(hwnd(), SW_SHOWNORMAL);
   }
   virtual ui::Compositor* GetCompositor() OVERRIDE {
     return compositor_;
   }
 
+  // Overridden from CompositorDelegate:
+  virtual void ScheduleCompositorPaint() OVERRIDE {
+    RECT rect;
+    ::GetClientRect(hwnd(), &rect);
+    InvalidateRect(hwnd(), &rect, FALSE);
+  }
+
  private:
   BEGIN_MSG_MAP_EX(TestCompositorHostWin)
     MSG_WM_PAINT(OnPaint)
   END_MSG_MAP()
 
   void OnPaint(HDC dc) {
     compositor_->NotifyStart();
     delegate_->Draw();
     compositor_->NotifyEnd();
     ValidateRect(hwnd(), NULL);
@@ skipping 12 matching lines @@
 };
 
 TestCompositorHost* TestCompositorHost::Create(
     const gfx::Rect& bounds,
     TestCompositorHostDelegate* delegate) {
   return new TestCompositorHostWin(bounds, delegate);
 }
 
 }  // namespace ui