Move the rest of the renderer->browser messages that belong in content. Also do a bunch of cleanup:

chrome/common/devtools_messages.cc

-// 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.
-
-// Get basic type definitions.
-#define IPC_MESSAGE_IMPL
-#include "chrome/common/devtools_messages.h"
-#include "chrome/common/common_param_traits.h"
-
-// Generate constructors.
-#include "ipc/struct_constructor_macros.h"
-#include "chrome/common/devtools_messages.h"
-
-// Generate destructors.
-#include "ipc/struct_destructor_macros.h"
-#include "chrome/common/devtools_messages.h"
-
-// Generate param traits write methods.
-#include "ipc/param_traits_write_macros.h"
-namespace IPC {
-#include "chrome/common/devtools_messages.h"
-}  // namespace IPC
-
-// Generate param traits read methods.
-#include "ipc/param_traits_read_macros.h"
-namespace IPC {
-#include "chrome/common/devtools_messages.h"
-}  // namespace IPC
-
-// Generate param traits log methods.
-#include "ipc/param_traits_log_macros.h"
-namespace IPC {
-#include "chrome/common/devtools_messages.h"
-}  // namespace IPC
-