Generate param traits size methods for IPC files in content/ (and traits it depends on).

content/common/input/input_param_traits.h

 // 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.
 
 // This file defines IPC::ParamTraits<> specializations for several
 // input-related types that require manual serialiation code.
 
 #ifndef CONTENT_COMMON_INPUT_INPUT_PARAM_TRAITS_H_
 #define CONTENT_COMMON_INPUT_INPUT_PARAM_TRAITS_H_
 
 #include "content/common/content_export.h"
 #include "content/common/content_param_traits_macros.h"
 #include "content/common/input/scoped_web_input_event.h"
 #include "content/common/input/synthetic_gesture_packet.h"
 
 namespace IPC {
 
 template <>
 struct CONTENT_EXPORT ParamTraits<content::ScopedWebInputEvent> {
   typedef content::ScopedWebInputEvent param_type;
+  static void GetSize(base::PickleSizer* s, const param_type& p);
   static void Write(base::Pickle* m, const param_type& p);
   static bool Read(const base::Pickle* m,
                    base::PickleIterator* iter,
                    param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
 template<>
 struct CONTENT_EXPORT ParamTraits<content::SyntheticGesturePacket> {
   typedef content::SyntheticGesturePacket param_type;
   static void Write(base::Pickle* m, const param_type& p);
   static bool Read(const base::Pickle* m,
                    base::PickleIterator* iter,
                    param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
 }  // namespace IPC
 
 #endif  // CONTENT_COMMON_INPUT_INPUT_PARAM_TRAITS_H_