Implement a method to access the non-composited content root layer picture pile.

cc/single_thread_proxy.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/single_thread_proxy.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/draw_quad.h"
 #include "cc/layer_tree_host.h"
+#include "cc/layer_tree_impl.h"
 #include "cc/output_surface.h"
+#include "cc/picture_layer.h"
+#include "cc/picture_layer_impl.h"
+#include "cc/picture_pile_impl.h"
 #include "cc/resource_update_controller.h"
 #include "cc/thread.h"
 
 namespace cc {
 
 scoped_ptr<Proxy> SingleThreadProxy::create(LayerTreeHost* layerTreeHost)
 {
     return make_scoped_ptr(new SingleThreadProxy(layerTreeHost)).PassAs<Proxy>();
 }
 
@@ skipping 376 matching lines @@
         m_nextFrameIsNewlyCommittedFrame = false;
         m_layerTreeHost->didCommitAndDrawFrame();
     }
 }
 
 bool SingleThreadProxy::commitPendingForTesting()
 {
     return false;
 }
 
+scoped_refptr<PicturePileImpl> SingleThreadProxy::capturePicturePile(const PictureLayer* layer)

[enne (OOO), 2013/01/02 19:35:22]

Please just make this a NOTREACHED().  Impl-side painting is only supported when
threaded compositing is turned on.

[Leandro Graciá Gil, 2013/01/03 20:32:10]

Done.

+{
+    LayerTreeImpl* tree = m_layerTreeHostImpl->pendingTree() ? m_layerTreeHostImpl->pendingTree() : m_layerTreeHostImpl->activeTree();
+    LayerImpl* layer_impl = tree->LayerById(layer->id());
+    if (!layer_impl)
+        return scoped_refptr<PicturePileImpl>();
+
+    const PictureLayerImpl* picture_layer_impl = static_cast<PictureLayerImpl*>(layer_impl);
+    return picture_layer_impl->pile()->CloneForDrawing();
+}
+
 }  // namespace cc