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

ipc/ipc_message.cc

 // 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.
 
 #include "ipc/ipc_message.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 231 matching lines @@
 
 bool Message::WriteAttachment(
     scoped_refptr<base::Pickle::Attachment> attachment) {
   bool brokerable;
   size_t index;
   bool success = attachment_set()->AddAttachment(
       make_scoped_refptr(static_cast<MessageAttachment*>(attachment.get())),
       &index, &brokerable);
   DCHECK(success);
 
+  // NOTE: If you add more data to the pickle, make sure to update
+  // PickleSizer::AddAttachment.
+
   // Write the type of descriptor.
   WriteBool(brokerable);
 
   // Write the index of the descriptor so that we don't have to
   // keep the current descriptor as extra decoding state when deserialising.
   WriteInt(static_cast<int>(index));
 
 #if USE_ATTACHMENT_BROKER
   if (brokerable)
     header()->num_brokered_attachments++;
@@ skipping 31 matching lines @@
 bool Message::HasMojoHandles() const {
   return attachment_set_.get() && attachment_set_->num_mojo_handles() > 0;
 }
 
 bool Message::HasBrokerableAttachments() const {
   return attachment_set_.get() &&
          attachment_set_->num_brokerable_attachments() > 0;
 }
 
 }  // namespace IPC