Stop using renderer specific host ids in ResourceDispatcher. This allows it ...

chrome/common/plugin_messages_internal.h

 // Copyright (c) 2006-2008 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 "base/shared_memory.h"
 #include "chrome/common/ipc_message_macros.h"
 #include "webkit/glue/webcursor.h"
 
 //-----------------------------------------------------------------------------
 // PluginProcess messages
 // These are messages sent from the browser to the plugin process.
 IPC_BEGIN_MESSAGES(PluginProcess)
   // Tells the plugin process to create a new channel for communication with a
   // renderer.  The channel name is returned in a
   // PluginProcessHostMsg_ChannelCreated message.
-  // The renderer_handle is the handle of the renderer process requesting
-  // the channel. It has to be valid in the context of the plugin process.
-  IPC_MESSAGE_CONTROL2(PluginProcessMsg_CreateChannel,
-                       int /* process_id */,
-                       HANDLE /* renderer handle */)
+  IPC_MESSAGE_CONTROL0(PluginProcessMsg_CreateChannel)
 
   IPC_MESSAGE_CONTROL1(PluginProcessMsg_ShutdownResponse,
                        bool /* ok to shutdown */)
 
   // Allows a chrome plugin loaded in the browser process to send arbitrary
   // data to an instance of the same plugin loaded in a plugin process.
   IPC_MESSAGE_CONTROL1(PluginProcessMsg_PluginMessage,
                        std::vector<uint8> /* opaque data */)
 
   IPC_MESSAGE_CONTROL0(PluginProcessMsg_BrowserShutdown)
 
 IPC_END_MESSAGES(PluginProcess)
 
 
 //-----------------------------------------------------------------------------
 // PluginProcessHost messages
 // These are messages sent from the plugin process to the browser process.
 IPC_BEGIN_MESSAGES(PluginProcessHost)
   // Response to a PluginProcessMsg_CreateChannel message.
-  IPC_MESSAGE_CONTROL2(PluginProcessHostMsg_ChannelCreated,
-                       int /* process_id */,
+  IPC_MESSAGE_CONTROL1(PluginProcessHostMsg_ChannelCreated,
                        std::wstring /* channel_name */)
 
   IPC_MESSAGE_ROUTED3(PluginProcessHostMsg_DownloadUrl,
                       std::string /* URL */,
                       int /* process id */,
                       HWND /* caller window */)
 
   IPC_SYNC_MESSAGE_CONTROL0_1(PluginProcessHostMsg_GetPluginFinderUrl,
                               std::string /* plugin finder URL */)
 
@@ skipping 263 matching lines @@
   IPC_SYNC_MESSAGE_ROUTED2_2(NPObjectMsg_Evaluate,
                              std::string /* script */,
                              bool /* popups_allowed */,
                              NPVariant_Param /* result_param */,
                              bool /* result */)
 
   IPC_SYNC_MESSAGE_ROUTED1_0(NPObjectMsg_SetException,
                              std::string /* message */)
 
 IPC_END_MESSAGES(NPObject)