Revert of base: Remove using:: declaration from version.h header.

chrome/browser/component_updater/recovery_component_installer.cc

Index: chrome/browser/component_updater/recovery_component_installer.cc
diff --git a/chrome/browser/component_updater/recovery_component_installer.cc b/chrome/browser/component_updater/recovery_component_installer.cc
index 5341290c2e8ad25aed2c34506d3e7a6273f06785..3657d6458dc7cc6f3c6ec177e04c57e3825b0800 100644
--- a/chrome/browser/component_updater/recovery_component_installer.cc
+++ b/chrome/browser/component_updater/recovery_component_installer.cc
@@ -92,7 +92,7 @@
     const base::FilePath& command,
     const base::DictionaryValue& manifest,
     bool is_deferred_run,
-    const base::Version& version) {
+    const Version& version) {
   base::CommandLine command_line(command);
 
   // Add a flag to for re-attempted install with elevated privilege so that the
@@ -154,7 +154,7 @@
     return;
   std::string proposed_version;
   manifest->GetStringASCII("version", &proposed_version);
-  const base::Version version(proposed_version.c_str());
+  const Version version(proposed_version.c_str());
   if (!version.IsValid())
     return;
 
@@ -195,7 +195,7 @@
 // See chrome/browser/recovery/recovery_install_global_error.cc for details.
 class RecoveryComponentInstaller : public update_client::CrxInstaller {
  public:
-  RecoveryComponentInstaller(const base::Version& version, PrefService* prefs);
+  RecoveryComponentInstaller(const Version& version, PrefService* prefs);
 
   // ComponentInstaller implementation:
   void OnUpdateError(int error) override;
@@ -214,7 +214,7 @@
   bool RunInstallCommand(const base::CommandLine& cmdline,
                          const base::FilePath& installer_folder) const;
 
-  base::Version current_version_;
+  Version current_version_;
   PrefService* prefs_;
 };
 
@@ -224,7 +224,7 @@
 
 void RecoveryRegisterHelper(ComponentUpdateService* cus, PrefService* prefs) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  base::Version version(prefs->GetString(prefs::kRecoveryComponentVersion));
+  Version version(prefs->GetString(prefs::kRecoveryComponentVersion));
   if (!version.IsValid()) {
     NOTREACHED();
     return;
@@ -240,8 +240,7 @@
   }
 }
 
-void RecoveryUpdateVersionHelper(const base::Version& version,
-                                 PrefService* prefs) {
+void RecoveryUpdateVersionHelper(const Version& version, PrefService* prefs) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   prefs->SetString(prefs::kRecoveryComponentVersion, version.GetString());
 }
@@ -253,9 +252,8 @@
   prefs->SetBoolean(prefs::kRecoveryComponentNeedsElevation, true);
 }
 
-RecoveryComponentInstaller::RecoveryComponentInstaller(
-    const base::Version& version,
-    PrefService* prefs)
+RecoveryComponentInstaller::RecoveryComponentInstaller(const Version& version,
+                                                       PrefService* prefs)
     : current_version_(version), prefs_(prefs) {
   DCHECK(version.IsValid());
 }
@@ -330,7 +328,7 @@
     return false;
   std::string proposed_version;
   manifest.GetStringASCII("version", &proposed_version);
-  base::Version version(proposed_version.c_str());
+  Version version(proposed_version.c_str());
   if (!version.IsValid())
     return false;
   if (current_version_.CompareTo(version) >= 0)