Add logging to figure out which IPC we're failing to deserialize in RenderFrame.

BUG=369553
R=creis@chromium.org

Review URL: https://codereview.chromium.org/263833020

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@268565 0039d316-1c4b-4281-b951-d872f2087c98
int RenderFrameImpl::ShowContextMenu(ContextMenuClient* client,
                                     const ContextMenuParams& params) {
  DCHECK(client);  // A null client means "internal" when we issue callbacks.
  ContextMenuParams our_params(params);
  our_params.custom_context.request_id = pending_context_menus_.Add(client);
  Send(new FrameHostMsg_ContextMenu(routing_id_, our_params));
  return our_params.custom_context.request_id;
}

int RenderFrameImpl::ShowContextMenu(ContextMenuClient* client,
                                     const ContextMenuParams& params) {
  DCHECK(client);  // A null client means "internal" when we issue callbacks.
  ContextMenuParams our_params(params);
  our_params.custom_context.request_id = pending_context_menus_.Add(client);
  Send(new FrameHostMsg_ContextMenu(routing_id_, our_params));
  return our_params.custom_context.request_id;
}
