Fix docking behaviour for devtools windows that don't have an associated browser window

chrome/common/render_messages_internal.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 header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <map>
 #include <string>
@@ skipping 1548 matching lines @@
   IPC_MESSAGE_ROUTED1(ViewHostMsg_ForwardToDevToolsAgent,
                       IPC::Message /* one of DevToolsAgentMsg_XXX types */)
 
   // Activates (brings to the front) corresponding dev tools window.
   IPC_MESSAGE_ROUTED0(ViewHostMsg_ActivateDevToolsWindow)
 
   // Closes dev tools window that is inspecting current render_view_host.
   IPC_MESSAGE_ROUTED0(ViewHostMsg_CloseDevToolsWindow)
 
   // Attaches dev tools window that is inspecting current render_view_host.
-  IPC_MESSAGE_ROUTED0(ViewHostMsg_DockDevToolsWindow)
+  IPC_MESSAGE_ROUTED0(ViewHostMsg_RequestDockDevToolsWindow)
 
   // Detaches dev tools window that is inspecting current render_view_host.
-  IPC_MESSAGE_ROUTED0(ViewHostMsg_UndockDevToolsWindow)
+  IPC_MESSAGE_ROUTED0(ViewHostMsg_RequestUndockDevToolsWindow)
 
   // Updates runtime features store in devtools manager in order to support
   // cross-navigation instrumentation.
   IPC_MESSAGE_ROUTED2(ViewHostMsg_DevToolsRuntimeFeatureStateChanged,
                       std::string /* feature */,
                       bool /* enabled */)
 
   // Send back a string to be recorded by UserMetrics.
   IPC_MESSAGE_ROUTED1(ViewHostMsg_UserMetricsRecordAction,
                       std::string /* action */)
@@ skipping 717 matching lines @@
                        int /* render_view_id */,
                        int /* bridge_id */)
 
   // The |render_view_id| and |bridge_id| requests Geolocation service to
   // resume.
   IPC_MESSAGE_CONTROL2(ViewHostMsg_Geolocation_Resume,
                        int /* render_view_id */,
                        int /* bridge_id */)
 
 IPC_END_MESSAGES(ViewHost)