Activate LayerImpl tree with sync+push instead of pointer swap

cc/io_surface_layer_impl.cc

 // Copyright 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.
 
 #include "cc/io_surface_layer_impl.h"
 
 #include "base/stringprintf.h"
 #include "cc/gl_renderer.h" // For the GLC() macro.
 #include "cc/io_surface_draw_quad.h"
 #include "cc/layer_tree_impl.h"
@@ skipping 19 matching lines @@
     if (!m_ioSurfaceTextureId)
         return;
 
     OutputSurface* outputSurface = layerTreeImpl()->output_surface();
     // FIXME: Implement this path for software compositing.
     WebKit::WebGraphicsContext3D* context3d = outputSurface->Context3D();
     if (context3d)
         context3d->deleteTexture(m_ioSurfaceTextureId);
 }
 
+scoped_ptr<LayerImpl> IOSurfaceLayerImpl::createLayerImpl(LayerTreeImpl* treeImpl)
+{
+    return IOSurfaceLayerImpl::create(treeImpl, id()).PassAs<LayerImpl>();
+}
+
+void IOSurfaceLayerImpl::pushPropertiesTo(LayerImpl* layer)
+{
+    LayerImpl::pushPropertiesTo(layer);
+
+    IOSurfaceLayerImpl* ioSurfaceLayer = static_cast<IOSurfaceLayerImpl*>(layer);
+    ioSurfaceLayer->setIOSurfaceProperties(m_ioSurfaceId, m_ioSurfaceSize);
+}
+
 void IOSurfaceLayerImpl::willDraw(ResourceProvider* resourceProvider)
 {
     LayerImpl::willDraw(resourceProvider);
 
     if (m_ioSurfaceChanged) {
         WebKit::WebGraphicsContext3D* context3d = resourceProvider->graphicsContext3D();
         if (!context3d) {
             // FIXME: Implement this path for software compositing.
             return;
         }
@@ skipping 58 matching lines @@
     m_ioSurfaceId = ioSurfaceId;
     m_ioSurfaceSize = size;
 }
 
 const char* IOSurfaceLayerImpl::layerTypeAsString() const
 {
     return "IOSurfaceLayer";
 }
 
 }  // namespace cc