Support bottom-right anchored fixed-position elements during a pinch gesture

cc/layers/layer_position_constraint.h

Index: cc/layers/layer_position_constraint.h
diff --git a/cc/layers/layer_position_constraint.h b/cc/layers/layer_position_constraint.h
new file mode 100644
index 0000000000000000000000000000000000000000..1dbedd0bff7c5f93448c5c25edf51818f60bf451
--- /dev/null
+++ b/cc/layers/layer_position_constraint.h
@@ -0,0 +1,36 @@
+// Copyright 2013 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 CC_LAYER_POSITION_CONSTRAINT_H_
+#define CC_LAYER_POSITION_CONSTRAINT_H_
+
+namespace WebKit {
+  struct WebLayerPositionConstraint;

[jamesr, 2013/03/22 01:49:50]

NAK on this.  Things in cc/ should not depend on things in WebKit. Add any
translation code you need between WebKit and cc types in
webkit/compositor_bindings

+}
+
+namespace cc {
+
+class LayerPositionConstraint {
+public:
+  LayerPositionConstraint();
+  LayerPositionConstraint(const WebKit::WebLayerPositionConstraint&);
+
+  bool is_fixed_position() const { return is_fixed_position_; }
+  bool is_fixed_to_right_edge() const { return is_fixed_to_right_edge_; }
+  bool is_fixed_to_bottom_edge() const { return is_fixed_to_bottom_edge_; }
+
+  bool operator==(const LayerPositionConstraint&) const;
+  bool operator!=(const LayerPositionConstraint&) const;
+
+  operator WebKit::WebLayerPositionConstraint() const;

[jamesr, 2013/03/22 01:49:50]

NAK

+
+private:
+  bool is_fixed_position_       : 1;
+  bool is_fixed_to_right_edge_  : 1;
+  bool is_fixed_to_bottom_edge_ : 1;
+};
+
+}  // namespace cc
+
+#endif  // CC_LAYER_POSITION_CONSTRAINT_H_