aura: Use Layer::SetShowPaintedContent to stop showing external content

ui/views/view.cc

 // Copyright (c) 2012 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.
 
 #define _USE_MATH_DEFINES // For VC++ to get M_PI. This has to be first.
 
 #include "ui/views/view.h"
 
 #include <algorithm>
 #include <cmath>
@@ skipping 1323 matching lines @@
 }
 
 // Accelerated Painting --------------------------------------------------------
 
 void View::SetFillsBoundsOpaquely(bool fills_bounds_opaquely) {
   // This method should not have the side-effect of creating the layer.
   if (layer())
     layer()->SetFillsBoundsOpaquely(fills_bounds_opaquely);
 }
 
-bool View::SetExternalTexture(ui::Texture* texture) {
-  DCHECK(texture);
-  SetPaintToLayer(true);
-
-  layer()->SetExternalTexture(texture);
-
-  // Child views must not paint into the external texture. So make sure each
-  // child view has its own layer to paint into.
-  for (Views::iterator i = children_.begin(); i != children_.end(); ++i)
-    (*i)->SetPaintToLayer(true);
-
-  SchedulePaintInRect(GetLocalBounds());
-  return true;
-}
-
 gfx::Vector2d View::CalculateOffsetToAncestorWithLayer(
     ui::Layer** layer_parent) {
   if (layer()) {
     if (layer_parent)
       *layer_parent = layer();
     return gfx::Vector2d();
   }
   if (!parent_)
     return gfx::Vector2d();
 
@@ skipping 928 matching lines @@
   // Message the RootView to do the drag and drop. That way if we're removed
   // the RootView can detect it and avoid calling us back.
   gfx::Point widget_location(event.location());
   ConvertPointToWidget(this, &widget_location);
   widget->RunShellDrag(this, data, widget_location, drag_operations, source);
   // WARNING: we may have been deleted.
   return true;
 }
 
 }  // namespace views