Consistently use namespaced base::Version in extensions code.

chrome/browser/extensions/chrome_extensions_browser_client.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/extensions/chrome_extensions_browser_client.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
@@ skipping 307 matching lines @@
 
 bool ChromeExtensionsBrowserClient::IsBackgroundUpdateAllowed() {
   return !base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kDisableBackgroundNetworking);
 }
 
 bool ChromeExtensionsBrowserClient::IsMinBrowserVersionSupported(
     const std::string& min_version) {
   base::Version browser_version =
       base::Version(version_info::GetVersionNumber());
-  Version browser_min_version(min_version);
+  base::Version browser_min_version(min_version);
   if (browser_version.IsValid() && browser_min_version.IsValid() &&
       browser_min_version.CompareTo(browser_version) > 0) {
     return false;
   }
   return true;
 }
 
 ExtensionWebContentsObserver*
 ChromeExtensionsBrowserClient::GetExtensionWebContentsObserver(
     content::WebContents* web_contents) {
@@ skipping 72 matching lines @@
       new ChromeExtensionBluetoothChooser(frame, event_handler));
 }
 
 bool ChromeExtensionsBrowserClient::IsActivityLoggingEnabled(
     content::BrowserContext* context) {
   ActivityLog* activity_log = ActivityLog::GetInstance(context);
   return activity_log && activity_log->is_active();
 }
 
 }  // namespace extensions