Update all users of base::Version to explicitly specify the namespace, and clean up the header.

chrome/browser/extensions/extension_sync_data.cc

 // Copyright (c) 2012 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/extension_sync_data.h"
 
 #include "base/logging.h"
 #include "chrome/browser/extensions/app_sync_data.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/common/extensions/manifest_url_handler.h"
@@ skipping 61 matching lines @@
   specifics->set_incognito_enabled(incognito_enabled_);
   specifics->set_name(name_);
 }
 
 void ExtensionSyncData::PopulateFromExtensionSpecifics(
     const sync_pb::ExtensionSpecifics& specifics) {
   if (!Extension::IdIsValid(specifics.id())) {
     LOG(FATAL) << "Attempt to sync bad ExtensionSpecifics.";
   }
 
-  Version specifics_version(specifics.version());
+  base::Version specifics_version(specifics.version());
   if (!specifics_version.IsValid())
     LOG(FATAL) << "Attempt to sync bad ExtensionSpecifics.";
 
   // The update URL must be either empty or valid.
   GURL specifics_update_url(specifics.update_url());
   if (!specifics_update_url.is_empty() && !specifics_update_url.is_valid()) {
     LOG(FATAL) << "Attempt to sync bad ExtensionSpecifics.";
   }
 
   id_ = specifics.id();
@@ skipping 13 matching lines @@
   const sync_pb::EntitySpecifics& entity_specifics = sync_data.GetSpecifics();
 
   if (entity_specifics.has_extension()) {
     PopulateFromExtensionSpecifics(entity_specifics.extension());
   } else {
     LOG(FATAL) << "Attempt to sync bad EntitySpecifics.";
   }
 }
 
 }  // namespace extensions