Add the "virtual" keyword on method overrides that are missing it.

chrome/browser/profile_import_process_host.h

 // Copyright (c) 2010 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 CHROME_BROWSER_PROFILE_IMPORT_PROCESS_HOST_H_
 #define CHROME_BROWSER_PROFILE_IMPORT_PROCESS_HOST_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 105 matching lines @@
  protected:
   // Allow these methods to be overridden for tests.
   virtual FilePath GetProfileImportProcessCmd();
 
  private:
   // Launch the new process.
   bool StartProcess();
 
   // Called by the external importer process to send messages back to the
   // ImportProcessClient.
-  void OnMessageReceived(const IPC::Message& message);
+  virtual void OnMessageReceived(const IPC::Message& message);
 
   // Overridden from BrowserChildProcessHost:
   virtual void OnProcessCrashed();
   virtual bool CanShutdown();
   virtual URLRequestContext* GetRequestContext(
       uint32 request_id,
       const ViewHostMsg_Resource_Request& request_data);
 
   // Receives messages to be passed back to the importer host.
   scoped_refptr<ImportProcessClient> import_process_client_;
 
   // The thread where the import_process_client_ lives.
   BrowserThread::ID thread_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileImportProcessHost);
 };
 
 #endif  // CHROME_BROWSER_PROFILE_IMPORT_PROCESS_HOST_H_