Update all users of base::Version to explicitly specify the namespace, and clean up the header.

chrome/installer/setup/install.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 contains the specification of setup main functions.
 
 #ifndef CHROME_INSTALLER_SETUP_INSTALL_H_
 #define CHROME_INSTALLER_SETUP_INSTALL_H_
 
 #include <vector>
@@ skipping 40 matching lines @@
 
 // Escape |att_value| as per the XML AttValue production
 // (http://www.w3.org/TR/2008/REC-xml-20081126/#NT-AttValue) for a value in
 // single quotes.
 void EscapeXmlAttributeValueInSingleQuotes(base::string16* att_value);
 
 // Creates VisualElementsManifest.xml beside chrome.exe in |src_path| if
 // |src_path|\VisualElements exists.
 // Returns true unless the manifest is supposed to be created, but fails to be.
 bool CreateVisualElementsManifest(const base::FilePath& src_path,
-                                  const Version& version);
+                                  const base::Version& version);
 
 // Overwrites shortcuts (desktop, quick launch, and start menu) if they are
 // present on the system.
 // |prefs| can affect the behavior of this method through
 // kDoNotCreateDesktopShortcut, kDoNotCreateQuickLaunchShortcut, and
 // kAltShortcutText.
 // |install_level| specifies whether to install per-user shortcuts or shortcuts
 // for all users on the system (this should only be used to update legacy
 // system-level installs).
 // If |install_operation| is a creation command, appropriate shortcuts will be
@@ skipping 35 matching lines @@
 // is responsible for cleaning up install_temp_path.
 InstallStatus InstallOrUpdateProduct(
     const InstallationState& original_state,
     const InstallerState& installer_state,
     const base::FilePath& setup_path,
     const base::FilePath& archive_path,
     const base::FilePath& install_temp_path,
     const base::FilePath& src_path,
     const base::FilePath& prefs_path,
     const installer::MasterPreferences& prefs,
-    const Version& new_version);
+    const base::Version& new_version);
 
 // Performs installation-related tasks following an OS upgrade.
 // |chrome| The installed product (must be a browser).
 void HandleOsUpgradeForBrowser(const InstallerState& installer_state,
                                const Product& chrome);
 
 // Performs per-user installation-related tasks on Active Setup (ran on first
 // login for each user post system-level Chrome install).
 // |installation_root|: The root of this install (i.e. the directory in which
 // chrome.exe is installed).
 // Shortcut creation is skipped if the First Run beacon is present (unless
 // |force| is set to true).
 // |chrome| The installed product (must be a browser).
 void HandleActiveSetupForBrowser(const base::FilePath& installation_root,
                                  const Product& chrome,
                                  bool force);
 
 // Launches app_host.exe to install content from web store (non-blocking).
 // Returns true on successful execution (although successful installation
 // is not guaranteed).
 bool InstallFromWebstore(const std::string& app_code);
 
 }  // namespace installer
 
 #endif  // CHROME_INSTALLER_SETUP_INSTALL_H_