Move ExtensionHostMsg_PostMessage IPC handling from

chrome/browser/renderer_host/chrome_extension_message_filter.cc

Index: chrome/browser/renderer_host/chrome_extension_message_filter.cc
diff --git a/chrome/browser/renderer_host/chrome_extension_message_filter.cc b/chrome/browser/renderer_host/chrome_extension_message_filter.cc
index cad18b665a88c5d88fdda749023cfd879bdf8a79..91984c0b04d06156aad43eef6751bc4d702d936e 100644
--- a/chrome/browser/renderer_host/chrome_extension_message_filter.cc
+++ b/chrome/browser/renderer_host/chrome_extension_message_filter.cc
@@ -22,6 +22,7 @@
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "extensions/browser/extension_system.h"
+#include "extensions/common/api/messaging/message.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension_messages.h"
 #include "extensions/common/file_util.h"
@@ -96,6 +97,7 @@ bool ChromeExtensionMessageFilter::OnMessageReceived(
     IPC_MESSAGE_HANDLER(ExtensionHostMsg_OpenChannelToTab, OnOpenChannelToTab)
     IPC_MESSAGE_HANDLER(ExtensionHostMsg_OpenChannelToNativeApp,
                         OnOpenChannelToNativeApp)
+    IPC_MESSAGE_HANDLER(ExtensionHostMsg_PostMessage, OnPostMessage)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(ExtensionHostMsg_GetMessageBundle,
                                     OnGetExtMessageBundle)
     IPC_MESSAGE_HANDLER(ExtensionHostMsg_CloseChannel, OnExtensionCloseChannel)
@@ -244,6 +246,12 @@ void ChromeExtensionMessageFilter::OpenChannelToTabOnUIThread(
   }
 }
 
+void ChromeExtensionMessageFilter::OnPostMessage(
+    int port_id,
+    const extensions::Message& message) {
+  extensions::MessageService::Get(profile_)->PostMessage(port_id, message);
+}
+
 void ChromeExtensionMessageFilter::OnGetExtMessageBundle(
     const std::string& extension_id, IPC::Message* reply_msg) {
   const extensions::Extension* extension =