  
  ATOM g_window_class;
  
- // This runs on the window owner thread.
+-// This runs on the window owner thread.
 -LRESULT CALLBACK IntermediateWindowProc(HWND window,
 -                                        UINT message,
 -                                        WPARAM w_param,

 
 }  // namespace gpu
diff --git a/gpu/ipc/service/child_window_win.h b/gpu/ipc/service/child_window_win.h
index c11202b..2b29fc6 100644
--- a/gpu/ipc/service/child_window_win.h
+++ b/gpu/ipc/service/child_window_win.h
@@ -7,14 +7,13 @@

   HWND parent_window_;
   HWND window_;
diff --git a/gpu/ipc/service/direct_composition_surface_win.cc b/gpu/ipc/service/direct_composition_surface_win.cc
index da05d806bfa7e8710833eec7a2d85dfaeb9ed37a..761384364cb2544bc984f391b7c433e12fae1c33 100644
--- a/gpu/ipc/service/direct_composition_surface_win.cc
+++ b/gpu/ipc/service/direct_composition_surface_win.cc
@@ -1573,8 +1573,6 @@ gfx::SwapResult DirectCompositionSurfaceWin::SwapBuffers(
   gl::GLSurfacePresentationHelper::ScopedSwapBuffers scoped_swap_buffers(
       presentation_helper_.get(), callback);
 
-  child_window_.ClearInvalidContents();
-
   bool succeeded = true;
 
   if (root_surface_->SwapBuffers(PresentationCallback()) ==
