Make GetCommandExecuteImplClsid return the CLSID as a string directly.

chrome/installer/util/browser_distribution.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.
 //
 // This file declares a class that contains various method related to branding.
 
 #ifndef CHROME_INSTALLER_UTIL_BROWSER_DISTRIBUTION_H_
 #define CHROME_INSTALLER_UTIL_BROWSER_DISTRIBUTION_H_
 
 #include <string>
@@ skipping 122 matching lines @@
   virtual base::string16 GetUninstallRegPath();
 
   // Returns an enum specifying the different ways in which this distribution
   // is allowed to be set as default.
   virtual DefaultBrowserControlPolicy GetDefaultBrowserControlPolicy();
 
   virtual bool CanCreateDesktopShortcuts();
 
   virtual bool GetChromeChannel(base::string16* channel);
 
-  // Returns true if this distribution includes a DelegateExecute verb handler,
-  // and provides the CommandExecuteImpl class UUID if |handler_class_uuid| is
-  // non-NULL.
-  virtual bool GetCommandExecuteImplClsid(base::string16* handler_class_uuid);
+  // Returns the CommandExecuteImpl class UUID (or empty string if this
+  // distribution doesn't include a DelegateExecute verb handler).
+  virtual base::string16 GetCommandExecuteImplClsid();
 
   virtual void UpdateInstallStatus(bool system_install,
       installer::ArchiveType archive_type,
       installer::InstallStatus install_status);
 
   // Returns true if this distribution should set the Omaha experiment_labels
   // registry value.
   virtual bool ShouldSetExperimentLabels();
 
   virtual bool HasUserExperiments();
 
  protected:
   BrowserDistribution(Type type, scoped_ptr<AppRegistrationData> app_reg_data);
 
   template<class DistributionClass>
   static BrowserDistribution* GetOrCreateBrowserDistribution(
       BrowserDistribution** dist);
 
   const Type type_;
 
   scoped_ptr<AppRegistrationData> app_reg_data_;
 
  private:
   BrowserDistribution();
 
   DISALLOW_COPY_AND_ASSIGN(BrowserDistribution);
 };
 
 #endif  // CHROME_INSTALLER_UTIL_BROWSER_DISTRIBUTION_H_