Here are gyp targets and stubs for compiling libcc and the webkit_compositor bindings in chromium. Everything is guarded behind the off-by-default use_libcc_for_compositor gyp variable. I haven't included the actual code here, but there are scripts to sync. I plan to land + manually sync the code into place until we're ready to flip the gyp switch.

Snapshot from r126652

BUG=

Review URL: https://chromiumcodereview.appspot.com/10828381

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@153354 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 41 insertions, 0 deletions

diff --git a/cc/TreeSynchronizer.h b/cc/TreeSynchronizer.h
new file mode 100644
index 0000000..5c59e5b
--- /dev/null
+++ b/cc/TreeSynchronizer.h
@@ -0,0 +1,41 @@
+// 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.
+
+#ifndef TreeSynchronizer_h
+#define TreeSynchronizer_h
+
+#include <wtf/HashMap.h>
+#include <wtf/Noncopyable.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/PassOwnPtr.h>
+
+namespace WebCore {
+
+class CCLayerImpl;
+class CCLayerTreeHostImpl;
+class LayerChromium;
+
+class TreeSynchronizer {
+WTF_MAKE_NONCOPYABLE(TreeSynchronizer);
+public:
+    // Accepts a LayerChromium tree and returns a reference to a CCLayerImpl tree that duplicates the structure
+    // of the LayerChromium tree, reusing the CCLayerImpls in the tree provided by oldCCLayerImplRoot if possible.
+    static PassOwnPtr<CCLayerImpl> synchronizeTrees(LayerChromium* layerRoot, PassOwnPtr<CCLayerImpl> oldCCLayerImplRoot, CCLayerTreeHostImpl*);
+
+private:
+    TreeSynchronizer(); // Not instantiable.
+
+    typedef HashMap<int, OwnPtr<CCLayerImpl> > OwnPtrCCLayerImplMap;
+    typedef HashMap<int, CCLayerImpl*> RawPtrCCLayerImplMap;
+
+    // Declared as static member functions so they can access functions on LayerChromium as a friend class.
+    static PassOwnPtr<CCLayerImpl> reuseOrCreateCCLayerImpl(RawPtrCCLayerImplMap& newLayers, OwnPtrCCLayerImplMap& oldLayers, LayerChromium*);
+    static void collectExistingCCLayerImplRecursive(OwnPtrCCLayerImplMap& oldLayers, PassOwnPtr<CCLayerImpl>);
+    static PassOwnPtr<CCLayerImpl> synchronizeTreeRecursive(RawPtrCCLayerImplMap& newLayers, OwnPtrCCLayerImplMap& oldLayers, LayerChromium*, CCLayerTreeHostImpl*);
+    static void updateScrollbarLayerPointersRecursive(const RawPtrCCLayerImplMap& newLayers, LayerChromium*);
+};
+
+} // namespace WebCore
+
+#endif // TreeSynchronizer_h