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

content/common/content_param_traits.h

 // Copyright (c) 2012 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 is used to define IPC::ParamTraits<> specializations for a number
 // of types so that they can be serialized over IPC.  IPC::ParamTraits<>
 // specializations for basic types (like int and std::string) and types in the
 // 'base' project can be found in ipc/ipc_message_utils.h.  This file contains
 // specializations for types that are used by the content code, and which need
 // manual serialization code.  This is usually because they're not structs with
@@ skipping 24 matching lines @@
   }
   static void Log(const param_type& p, std::string* l) {
     l->append("<WebCursor>");
   }
 };
 
 typedef const blink::WebInputEvent* WebInputEventPointer;
 template <>
 struct ParamTraits<WebInputEventPointer> {
   typedef WebInputEventPointer param_type;
+  static void GetSize(base::PickleSizer* s, const param_type& p);
   static void Write(base::Pickle* m, const param_type& p);
   // Note: upon read, the event has the lifetime of the message.
   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_CONTENT_PARAM_TRAITS_H_