Completely revert all my IPC work to see if this was what regressed the page cycler.

ipc/ipc_message_utils_impl.h

-// Copyright (c) 2010 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 contains templates forward declared (but not defined) in
-// ipc_message_utils.h so that they are only instantiated in certain files,
-// notably ipc_message_impl_macros.h and a few IPC unit tests.
-
-#ifndef IPC_IPC_MESSAGE_UTILS_IMPL_H_
-#define IPC_IPC_MESSAGE_UTILS_IMPL_H_
-
-namespace IPC {
-
-template <class ParamType>
-MessageWithTuple<ParamType>::MessageWithTuple(
-    int32 routing_id, uint32 type, const RefParam& p)
-    : Message(routing_id, type, PRIORITY_NORMAL) {
-  WriteParam(this, p);
-}
-
-template <class ParamType>
-bool MessageWithTuple<ParamType>::Read(const Message* msg, Param* p) {
-  void* iter = NULL;
-  if (ReadParam(msg, &iter, p))
-    return true;
-  NOTREACHED() << "Error deserializing message " << msg->type();
-  return false;
-}
-
-// We can't migrate the template for Log() to MessageWithTuple, because each
-// subclass needs to have Log() to call Read(), which instantiates the above
-// template.
-
-template <class SendParamType, class ReplyParamType>
-MessageWithReply<SendParamType, ReplyParamType>::MessageWithReply(
-    int32 routing_id, uint32 type,
-    const RefSendParam& send,
-    const ReplyParam& reply)
-    : SyncMessage(routing_id, type, PRIORITY_NORMAL,
-                  new ParamDeserializer<ReplyParam>(reply)) {
-  WriteParam(this, send);
-}
-
-template <class SendParamType, class ReplyParamType>
-bool MessageWithReply<SendParamType, ReplyParamType>::ReadSendParam(
-    const Message* msg, SendParam* p) {
-  void* iter = SyncMessage::GetDataIterator(msg);
-  return ReadParam(msg, &iter, p);
-}
-
-template <class SendParamType, class ReplyParamType>
-bool MessageWithReply<SendParamType, ReplyParamType>::ReadReplyParam(
-    const Message* msg, typename TupleTypes<ReplyParam>::ValueTuple* p) {
-  void* iter = SyncMessage::GetDataIterator(msg);
-  return ReadParam(msg, &iter, p);
-}
-
-}  // namespace IPC
-
-#endif  // IPC_IPC_MESSAGE_UTILS_IMPL_H_