Ignore certain messages in plugin broker process if they are not sent by the

content/ppapi_plugin/ppapi_thread.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_
 #define CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 92 matching lines @@
   // Message handlers.
   void OnLoadPlugin(const base::FilePath& path,
                     const ppapi::PpapiPermissions& permissions);
   void OnCreateChannel(base::ProcessId renderer_pid,
                        int renderer_child_id,
                        bool incognito);
   void OnSetNetworkState(bool online);
   void OnCrash();
   void OnHang();
 
-  // Sets up the channel to the given renderer. On success, returns true and
-  // fills the given ChannelHandle with the information from the new channel.
-  bool SetupRendererChannel(base::ProcessId renderer_pid,
-                            int renderer_child_id,
-                            bool incognito,
-                            IPC::ChannelHandle* handle);
+  // Sets up the channel to the given renderer. If |renderer_pid| is
+  // base::kNullProcessId, the channel is set up to the browser. On success,
+  // returns true and fills the given ChannelHandle with the information from
+  // the new channel.
+  bool SetupChannel(base::ProcessId renderer_pid,
+                    int renderer_child_id,
+                    bool incognito,
+                    IPC::ChannelHandle* handle);
 
   // Sets up the name of the plugin for logging using the given path.
   void SavePluginName(const base::FilePath& path);
 
   void ReportLoadResult(const base::FilePath& path, LoadResult result);
 
   // Reports |error| to UMA when plugin load fails.
   void ReportLoadErrorCode(const base::FilePath& path,
                            const base::NativeLibraryLoadError& error);
 
@@ skipping 44 matching lines @@
   DISALLOW_IMPLICIT_CONSTRUCTORS(PpapiThread);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_