cc: Remove all blimp code from cc.

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
index 1ee4bc72775b403af0c9c0a9be1c2d6216d33c5e..9a5751377369e67ba229ccbddd02fa2224182782 100644
--- a/cc/layers/layer_position_constraint.h
+++ b/cc/layers/layer_position_constraint.h
@@ -9,10 +9,6 @@
 
 namespace cc {
 
-namespace proto {
-class LayerPositionConstraint;
-}
-
 class CC_EXPORT LayerPositionConstraint {
  public:
   LayerPositionConstraint();
@@ -28,9 +24,6 @@ class CC_EXPORT LayerPositionConstraint {
   }
   bool is_fixed_to_bottom_edge() const { return is_fixed_to_bottom_edge_; }
 
-  void ToProtobuf(proto::LayerPositionConstraint* proto) const;
-  void FromProtobuf(const proto::LayerPositionConstraint& proto);
-
   bool operator==(const LayerPositionConstraint&) const;
   bool operator!=(const LayerPositionConstraint&) const;