Make o.o.p. proxy handle PPP_Instance versions 0.4 and 0.5.

ppapi/proxy/plugin_dispatcher.cc

 // Copyright (c) 2011 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 "ppapi/proxy/plugin_dispatcher.h"
 
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
@@ skipping 113 matching lines @@
   if (msg.routing_id() == MSG_ROUTING_CONTROL) {
     // Handle some plugin-specific control messages.
     bool handled = true;
     IPC_BEGIN_MESSAGE_MAP(PluginDispatcher, msg)
       IPC_MESSAGE_HANDLER(PpapiMsg_SupportsInterface, OnMsgSupportsInterface)
       IPC_MESSAGE_HANDLER(PpapiMsg_SetPreferences, OnMsgSetPreferences)
     IPC_END_MESSAGE_MAP()
     return handled;
   }
 
-  if (msg.routing_id() <= 0 && msg.routing_id() >= INTERFACE_ID_COUNT) {
+  if (msg.routing_id() <= 0 || msg.routing_id() >= INTERFACE_ID_COUNT) {

[brettw, 2011/06/29 17:11:29]

Whoops!

     // Host is sending us garbage. Since it's supposed to be trusted, this
     // isn't supposed to happen. Crash here in all builds in case the renderer
     // is compromised.
     CHECK(false);
     return true;
   }
 
   // There are two cases:
   //
   // * The first case is that the host is calling a PPP interface. It will
@@ skipping 152 matching lines @@
   // once they're set. The user will have to restart to get new font prefs
   // propogated to plugins.
   if (!received_preferences_) {
     received_preferences_ = true;
     preferences_ = prefs;
   }
 }
 
 }  // namespace proxy
 }  // namespace pp