Show more different NaCl loading errors.

chrome/browser/nacl_host/nacl_process_host.h

Index: chrome/browser/nacl_host/nacl_process_host.h
===================================================================
--- chrome/browser/nacl_host/nacl_process_host.h	(revision 210749)
+++ chrome/browser/nacl_host/nacl_process_host.h	(working copy)
@@ -123,6 +123,9 @@
   // to load. Returns true on success.
   bool ReplyToRenderer(const IPC::ChannelHandle& channel_handle);
 
+  // Sends the reply with error message to the renderer.
+  void SendErrorToRenderer(const std::string& error_message);
+
   // Sends the message to the NaCl process to load the plugin. Returns true
   // on success.
   bool StartNaClExecution();