Update checks of multi-installs now use the proper app guid....

chrome/installer/util/package_properties.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
 #ifndef CHROME_INSTALLER_UTIL_PACKAGE_PROPERTIES_H_
 #define CHROME_INSTALLER_UTIL_PACKAGE_PROPERTIES_H_
 #pragma once
 
 #include <windows.h>
 
 #include <string>
@@ skipping 17 matching lines @@
  public:
   PackageProperties() {}
   virtual ~PackageProperties() {}
 
   static const char kPackageProductName[];
 
   // Returns true iff this package will be updated by Google Update.
   virtual bool ReceivesUpdates() const = 0;
 
   // Equivalent to BrowserDistribution::GetAppGuid()
+  virtual const std::wstring& GetAppGuid() = 0;
   virtual const std::wstring& GetStateKey() = 0;
   virtual const std::wstring& GetStateMediumKey() = 0;
   virtual const std::wstring& GetVersionKey() = 0;
   virtual void UpdateInstallStatus(bool system_level, bool incremental_install,
       bool multi_install, installer::InstallStatus status) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PackageProperties);
 };  // class PackageProperties
 
 class PackagePropertiesImpl : public PackageProperties {
  public:
   explicit PackagePropertiesImpl(const wchar_t* guid,
                                  const std::wstring& state_key,
                                  const std::wstring& state_medium_key,
                                  const std::wstring& version_key);
   virtual ~PackagePropertiesImpl();
 
+  virtual const std::wstring& GetAppGuid();
   virtual const std::wstring& GetStateKey();
   virtual const std::wstring& GetStateMediumKey();
   virtual const std::wstring& GetVersionKey();
   virtual void UpdateInstallStatus(bool system_level, bool incremental_install,
       bool multi_install, installer::InstallStatus status);
 
  protected:
   std::wstring guid_;
   std::wstring state_key_;
   std::wstring state_medium_key_;
@@ skipping 31 matching lines @@
 
 #if defined(GOOGLE_CHROME_BUILD)
 typedef ChromePackageProperties ActivePackageProperties;
 #else
 typedef ChromiumPackageProperties ActivePackageProperties;
 #endif
 
 }  // namespace installer
 
 #endif  // CHROME_INSTALLER_UTIL_PACKAGE_PROPERTIES_H_