Move Version to base namespace.

chrome/browser/extensions/api/runtime/runtime_api.h

Index: chrome/browser/extensions/api/runtime/runtime_api.h
diff --git a/chrome/browser/extensions/api/runtime/runtime_api.h b/chrome/browser/extensions/api/runtime/runtime_api.h
index a9fedc83c4647e413a2fcae0d65248892808b288..97bc65de1526efb48c50480d74902e5d5ea2e69c 100644
--- a/chrome/browser/extensions/api/runtime/runtime_api.h
+++ b/chrome/browser/extensions/api/runtime/runtime_api.h
@@ -10,7 +10,10 @@
 #include "content/public/browser/notification_registrar.h"
 
 class Profile;
+
+namespace base {
 class Version;
+}
 
 namespace extensions {
 class Extension;
@@ -25,7 +28,7 @@ class RuntimeEventRouter {
   // Dispatches the onInstalled event to the given extension.
   static void DispatchOnInstalledEvent(Profile* profile,
                                        const std::string& extension_id,
-                                       const Version& old_version,
+                                       const base::Version& old_version,
                                        bool chrome_updated);
 
   // Dispatches the onUpdateAvailable event to the given extension.