Revert "Update all users of base::Version to explicitly specify the namespace, and clean up the hea…

chrome/installer/setup/setup_main.cc

Index: chrome/installer/setup/setup_main.cc
diff --git a/chrome/installer/setup/setup_main.cc b/chrome/installer/setup/setup_main.cc
index 71e9a01b242530a3dc02accf936a9b6c984567f6..fa258abc65eaeacbad63109ace978903c3c116fa 100644
--- a/chrome/installer/setup/setup_main.cc
+++ b/chrome/installer/setup/setup_main.cc
@@ -291,7 +291,7 @@ installer::InstallStatus RenameChromeExecutables(
 // the proper installer result has been written to the registry.
 bool CheckGroupPolicySettings(const InstallationState& original_state,
                               const InstallerState& installer_state,
-                              const base::Version& new_version,
+                              const Version& new_version,
                               installer::InstallStatus* status) {
 #if !defined(GOOGLE_CHROME_BUILD)
   // Chromium builds are not updated via Google Update, so there are no
@@ -951,7 +951,7 @@ installer::InstallStatus RegisterDevChrome(
     scoped_ptr<WorkItemList> delegate_execute_list(
         WorkItem::CreateWorkItemList());
     installer::AddDelegateExecuteWorkItems(
-        installer_state, chrome_exe.DirName(), base::Version(), chrome,
+        installer_state, chrome_exe.DirName(), Version(), chrome,
         delegate_execute_list.get());
     delegate_execute_list->Do();
     if (ShellUtil::CanMakeChromeDefaultUnattended()) {
@@ -1174,7 +1174,7 @@ bool HandleNonInstallCmdLineOptions(const InstallationState& original_state,
       BrowserDistribution* browser_dist = product.distribution();
       // We started as system-level and have been re-launched as user level
       // to continue with the toast experiment.
-      base::Version installed_version;
+      Version installed_version;
       InstallUtil::GetChromeVersion(browser_dist, true, &installed_version);
       if (!installed_version.IsValid()) {
         LOG(ERROR) << "No installation of "
@@ -1463,7 +1463,7 @@ InstallStatus InstallProductsHelper(
   VLOG(1) << "unpacked to " << unpack_path.value();
   base::FilePath src_path(
       unpack_path.Append(kInstallSourceChromeDir));
-  scoped_ptr<base::Version>
+  scoped_ptr<Version>
       installer_version(GetMaxVersionFromArchiveDir(src_path));
   if (!installer_version.get()) {
     LOG(ERROR) << "Did not find any valid version in installer.";