Consistently use namespaced base::Version in chrome/installer.

chrome/installer/setup/install_worker.cc

Index: chrome/installer/setup/install_worker.cc
diff --git a/chrome/installer/setup/install_worker.cc b/chrome/installer/setup/install_worker.cc
index 3d10b4efd2fbbb8d65b4f8f2beb2c3debdf4c8e8..0e744e52520132b1ee567464a78c6419c5a42526 100644
--- a/chrome/installer/setup/install_worker.cc
+++ b/chrome/installer/setup/install_worker.cc
@@ -82,8 +82,8 @@ void GetOldIELowRightsElevationPolicyKeyPath(base::string16* key_path) {
 // products managed by a given package.
 // |old_version| can be NULL to indicate no Chrome is currently installed.
 void AddRegisterComDllWorkItemsForPackage(const InstallerState& installer_state,
-                                          const Version* old_version,
-                                          const Version& new_version,
+                                          const base::Version* old_version,
+                                          const base::Version& new_version,
                                           WorkItemList* work_item_list) {
   // First collect the list of DLLs to be registered from each product.
   std::vector<base::FilePath> com_dll_list;
@@ -125,7 +125,7 @@ void AddInstallerCopyTasks(const InstallerState& installer_state,
                            const base::FilePath& setup_path,
                            const base::FilePath& archive_path,
                            const base::FilePath& temp_path,
-                           const Version& new_version,
+                           const base::Version& new_version,
                            WorkItemList* install_list) {
   DCHECK(install_list);
   base::FilePath installer_dir(
@@ -228,8 +228,8 @@ void AddFirewallRulesWorkItems(const InstallerState& installer_state,
 void AddProductSpecificWorkItems(const InstallationState& original_state,
                                  const InstallerState& installer_state,
                                  const base::FilePath& setup_path,
-                                 const Version& new_version,
-                                 const Version* current_version,
+                                 const base::Version& new_version,
+                                 const base::Version* current_version,
                                  bool add_language_identifier,
                                  WorkItemList* list) {
   const Products& products = installer_state.products();
@@ -285,8 +285,8 @@ void AddChromeWorkItems(const InstallationState& original_state,
                         const base::FilePath& archive_path,
                         const base::FilePath& src_path,
                         const base::FilePath& temp_path,
-                        const Version* current_version,
-                        const Version& new_version,
+                        const base::Version* current_version,
+                        const base::Version& new_version,
                         WorkItemList* install_list) {
   const base::FilePath& target_path = installer_state.target_path();
 
@@ -412,7 +412,7 @@ void AddCleanupDelegateExecuteWorkItems(const InstallerState& installer_state,
 // state key if running under an MSI installer.
 void AddUninstallShortcutWorkItems(const InstallerState& installer_state,
                                    const base::FilePath& setup_path,
-                                   const Version& new_version,
+                                   const base::Version& new_version,
                                    const Product& product,
                                    WorkItemList* install_list) {
   HKEY reg_root = installer_state.root_key();
@@ -558,7 +558,7 @@ void AddUninstallShortcutWorkItems(const InstallerState& installer_state,
 void AddVersionKeyWorkItems(HKEY root,
                             const base::string16& version_key,
                             const base::string16& product_name,
-                            const Version& new_version,
+                            const base::Version& new_version,
                             bool add_language_identifier,
                             WorkItemList* list) {
   list->AddCreateRegKeyWorkItem(root, version_key, KEY_WOW64_32KEY);
@@ -895,8 +895,8 @@ void AddMigrateUsageStatesWorkItems(const InstallationState& original_state,
 
 bool AppendPostInstallTasks(const InstallerState& installer_state,
                             const base::FilePath& setup_path,
-                            const Version* current_version,
-                            const Version& new_version,
+                            const base::Version* current_version,
+                            const base::Version& new_version,
                             WorkItemList* post_install_task_list) {
   DCHECK(post_install_task_list);
 
@@ -917,7 +917,7 @@ bool AppendPostInstallTasks(const InstallerState& installer_state,
 
     // |critical_version| will be valid only if this in-use update includes a
     // version considered critical relative to the version being updated.
-    Version critical_version(installer_state.DetermineCriticalVersion(
+    base::Version critical_version(installer_state.DetermineCriticalVersion(
         current_version, new_version));
     base::FilePath installer_path(
         installer_state.GetInstallerDirectory(new_version).Append(
@@ -1043,8 +1043,8 @@ void AddInstallWorkItems(const InstallationState& original_state,
                          const base::FilePath& archive_path,
                          const base::FilePath& src_path,
                          const base::FilePath& temp_path,
-                         const Version* current_version,
-                         const Version& new_version,
+                         const base::Version* current_version,
+                         const base::Version& new_version,
                          WorkItemList* install_list) {
   DCHECK(install_list);
 
@@ -1202,7 +1202,7 @@ void AddCleanupDeprecatedPerUserRegistrationsWorkItems(const Product& product,
 }
 
 void AddActiveSetupWorkItems(const InstallerState& installer_state,
-                             const Version& new_version,
+                             const base::Version& new_version,
                              const Product& product,
                              WorkItemList* list) {
   DCHECK(installer_state.operation() != InstallerState::UNINSTALL);
@@ -1316,7 +1316,7 @@ void RefreshElevationPolicy() {
 
 void AddOsUpgradeWorkItems(const InstallerState& installer_state,
                            const base::FilePath& setup_path,
-                           const Version& new_version,
+                           const base::Version& new_version,
                            const Product& product,
                            WorkItemList* install_list) {
   const HKEY root_key = installer_state.root_key();