Cleanup: Remove unneeded forward declarations in chrome/installer.

chrome/installer/util/installation_validator.h

 // 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_INSTALLATION_VALIDATOR_H_
 #define CHROME_INSTALLER_UTIL_INSTALLATION_VALIDATOR_H_
 #pragma once
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "chrome/installer/util/browser_distribution.h"
-#include "chrome/installer/util/channel_info.h"
 
+class CommandLine;
 class FilePath;
-class Version;
 
 namespace installer {
 
 class InstallationState;
 class AppCommand;
 class ProductState;
 
 // A class that validates the state of an installation.  Violations are logged
 // via LOG(ERROR).
 class InstallationValidator {
@@ skipping 178 matching lines @@
   // A collection of all valid installation types.
   static const InstallationType kInstallationTypes[];
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(InstallationValidator);
 };
 
 }  // namespace installer
 
 #endif  // CHROME_INSTALLER_UTIL_INSTALLATION_VALIDATOR_H_