cc: Dedup IPCs to return resources to client

cc/ipc/cc_param_traits.h

Index: cc/ipc/cc_param_traits.h
diff --git a/cc/ipc/cc_param_traits.h b/cc/ipc/cc_param_traits.h
index c813a9dba97504b09e15c7b4c5c79b007d6a3727..7b88ee396a5ef80d092ff281d3903b5d32e28bf0 100644
--- a/cc/ipc/cc_param_traits.h
+++ b/cc/ipc/cc_param_traits.h
@@ -10,7 +10,6 @@
 #include "cc/ipc/cc_ipc_export.h"
 #include "cc/ipc/cc_param_traits_macros.h"
 #include "cc/output/compositor_frame.h"
-#include "cc/output/compositor_frame_ack.h"
 #include "cc/output/filter_operation.h"
 #include "cc/quads/draw_quad.h"
 #include "cc/quads/stream_video_draw_quad.h"
@@ -93,16 +92,6 @@ struct CC_IPC_EXPORT ParamTraits<cc::CompositorFrame> {
 };
 
 template <>
-struct CC_IPC_EXPORT ParamTraits<cc::CompositorFrameAck> {
-  typedef cc::CompositorFrameAck param_type;
-  static void Write(base::Pickle* m, const param_type& p);
-  static bool Read(const base::Pickle* m,
-                   base::PickleIterator* iter,
-                   param_type* p);
-  static void Log(const param_type& p, std::string* l);
-};
-
-template <>
 struct CC_IPC_EXPORT ParamTraits<cc::DelegatedFrameData> {
   typedef cc::DelegatedFrameData param_type;
   static void Write(base::Pickle* m, const param_type& p);