Reduce code size of BindingState

mojo/public/cpp/bindings/lib/filter_chain.h

Index: mojo/public/cpp/bindings/lib/filter_chain.h
diff --git a/mojo/public/cpp/bindings/lib/filter_chain.h b/mojo/public/cpp/bindings/lib/filter_chain.h
index 447be3d136860710b7795b5a60e83c234d99b975..77b8448f794e7431512f70fd917971dc92fe1ea3 100644
--- a/mojo/public/cpp/bindings/lib/filter_chain.h
+++ b/mojo/public/cpp/bindings/lib/filter_chain.h
@@ -28,6 +28,9 @@ class FilterChain {
   template <typename FilterType, typename... Args>
   inline void Append(Args&&... args);
 
+  // Takes ownership of |filter|.
+  void Append(MessageFilter* filter);
+
   // Doesn't take ownership of |sink|. Therefore |sink| has to stay alive while
   // this object is alive.
   void SetSink(MessageReceiver* sink);
@@ -50,10 +53,7 @@ class FilterChain {
 
 template <typename FilterType, typename... Args>
 inline void FilterChain::Append(Args&&... args) {
-  FilterType* filter = new FilterType(std::forward<Args>(args)..., sink_);
-  if (!filters_.empty())
-    filters_.back()->set_sink(filter);
-  filters_.push_back(filter);
+  Append(new FilterType(std::forward<Args>(args)..., sink_));
 }
 
 template <>