Add a new GetInstance() method for singleton classes, take 2.

chrome_frame/dll_redirector.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_FRAME_MODULE_UTILS_H_
 #define CHROME_FRAME_MODULE_UTILS_H_
 
 #include <ObjBase.h>
 #include <windows.h>
 
@@ skipping 15 matching lines @@
 //  1) That different versions of the module this code is in reside in
 //     neighbouring versioned directories, e.g.
 //       C:\foo\bar\1.2.3.4\my_module.dll
 //       C:\foo\bar\1.2.3.5\my_module.dll
 //  2) That the instance of this class will outlive the module that may be
 //     delegated to. That is to say, that this class only guarantees that the
 //     module is loaded as long as this instance is active.
 //  3) The module this is compiled into is built with version info.
 class DllRedirector {
  public:
+  // Returns the singleton instance.
+  static DllRedirector* GetInstance();
+
   virtual ~DllRedirector();
 
   // Attempts to register this Chrome Frame version as the first loaded version
   // on the system. If this succeeds, return true. If it fails, it returns
   // false meaning that there is another version already loaded somewhere and
   // the caller should delegate to that version instead.
   bool DllRedirector::RegisterAsFirstCFModule();
 
   // Unregisters the well known window class if we registered it earlier.
   // This is intended to be called from DllMain under PROCESS_DETACH.
@@ skipping 46 matching lines @@
 
   // Used for tests to override the name of the shared memory segment.
   std::string shared_memory_name_;
 
   friend class ModuleUtilsTest;
 
   DISALLOW_COPY_AND_ASSIGN(DllRedirector);
 };
 
 #endif  // CHROME_FRAME_MODULE_UTILS_H_