Add support for passing an arbitrary parameter to an IPC message handler. The motivation is for Web…

content/renderer/pepper/pepper_browser_connection.cc

Index: content/renderer/pepper/pepper_browser_connection.cc
===================================================================
--- content/renderer/pepper/pepper_browser_connection.cc	(revision 270145)
+++ content/renderer/pepper/pepper_browser_connection.cc	(working copy)
@@ -30,9 +30,9 @@
 
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PepperBrowserConnection, msg)
-  IPC_MESSAGE_HANDLER(PpapiHostMsg_CreateResourceHostsFromHostReply,
-                      OnMsgCreateResourceHostsFromHostReply)
-  IPC_MESSAGE_UNHANDLED(handled = false)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_CreateResourceHostsFromHostReply,
+                        OnMsgCreateResourceHostsFromHostReply)
+    IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }