Activate LayerImpl tree with sync+push instead of pointer swap

cc/texture_layer_impl.cc

 // Copyright 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 "cc/texture_layer_impl.h"
 
 #include "base/stringprintf.h"
 #include "cc/layer_tree_impl.h"
 #include "cc/quad_sink.h"
 #include "cc/renderer.h"
@@ skipping 36 matching lines @@
         return;
     // Two commits without a draw, ack the previous mailbox.
     if (m_hasPendingMailbox && !m_pendingMailboxReleaseCallback.is_null())
         m_pendingMailboxReleaseCallback.Run(0);
 
     m_pendingMailboxName = mailboxName;
     m_hasPendingMailbox = true;
     m_pendingMailboxReleaseCallback = releaseCallback;
 }
 
+scoped_ptr<LayerImpl> TextureLayerImpl::createLayerImpl(LayerTreeImpl* treeImpl)
+{
+    return TextureLayerImpl::create(treeImpl, id(), m_usesMailbox).PassAs<LayerImpl>();
+}
+
+void TextureLayerImpl::pushPropertiesTo(LayerImpl* layer)
+{
+    LayerImpl::pushPropertiesTo(layer);
+
+    TextureLayerImpl* textureLayer = static_cast<TextureLayerImpl*>(layer);
+    textureLayer->setFlipped(m_flipped);
+    textureLayer->setUVRect(m_uvRect);
+    textureLayer->setVertexOpacity(m_vertexOpacity);
+    textureLayer->setPremultipliedAlpha(m_premultipliedAlpha);
+    if (m_usesMailbox) {
+        textureLayer->setTextureMailbox(m_pendingMailboxName, m_pendingMailboxReleaseCallback);
+        m_pendingMailboxReleaseCallback.Reset();
+    } else {
+        textureLayer->setTextureId(m_textureId);
+    }
+}
+
+
 void TextureLayerImpl::willDraw(ResourceProvider* resourceProvider)
 {
     if (!m_usesMailbox) {
         if (!m_textureId)
             return;
         DCHECK(!m_externalTextureResource);
         m_externalTextureResource = resourceProvider->createResourceFromExternalTexture(m_textureId);
         return;
     }
 
@@ skipping 67 matching lines @@
 {
     return "TextureLayer";
 }
 
 bool TextureLayerImpl::canClipSelf() const
 {
     return true;
 }
 
 }  // namespace cc